After testing 120+ water bottles, these are the only tumblers we recommend
In addition to our No. 1 pick from Hydro Flask, we found nine other top performers, starting at just $16.
Our experts independently review everything we recommend. If you buy through our links, we may earn commission.
Most of us don't reach the recommended daily water intake , which is where a reusable water bottle can come in handy. After all, it's kind of hard to ignore a giant, brightly hued tumbler sitting on your desk or weighing down your bag. The best water bottles will help you get in those necessary sips, plus they're an easy way to cut back on single-use plastic.
In this story
Over the past few years, our home and health editors have tested more than 120 water bottles,including nontoxic tumblers and filtered vessels designed for outdoor adventures. To find the best water bottles of 2026, we put editor-favorite brands like Hydro Flask and Owala through multiple tests. We turned the bottles upside down to check if they were leakproof, repeatedly dropped them to assess durability, and left them filled with ice water for days to gauge insulation and temperature retention. Our winners are versatile and stylish, available in practically every color under the sun and will keep your drinks cold (or sometimes hot!) for hours.
Best water bottles of 2026 comparison chart
| Material |
Cap |
Volume |
Care |
|
|---|---|---|---|---|
| Hydro Flask Standard Flex Cap |
18/8 stainless steel |
Standard mouth, wide mouth, flex straw or flex chug |
24, 32, 40 or 64 oz. |
Dishwasher-safe |
| Lifefactory Glass Water Bottle |
Glass with silicone sleeve |
Flip |
12, 16 or 22 oz. |
Dishwasher-safe (cap top-rack only) |
| Yeti Rambler Travel Straw Mug |
18/8 stainless steel |
Straw |
20, 30 or 40 oz. |
Dishwasher-safe |
| Owala FreeSip Water Bottle with Straw |
Stainless steel |
FreeSip spout with locking lid |
16, 24, 32 or 40 oz. |
Lid is dishwasher-safe (hand-wash cup and straw) |
| Nalgene Sustain Tritan BPA-Free Water Bottle |
Tritan plastic |
Wide mouth, narrow mouth, lock top, Epic Filter or MultiDrink with straw |
16, 24, 32, 38 or 48 oz. |
Dishwasher-safe |
| HydroJug Traveler |
Stainless steel |
Flip straw |
32 or 40 oz. |
Dishwasher-safe |
| BrüMate Era Tumbler with Handle and Straw |
Stainless steel |
Straw |
30 or 40 oz. |
Top-rack dishwasher-safe |
| S'well Original Insulated Water Bottle |
18/8 stainless steel |
Original, sports or flip straw |
9, 17 or 25 oz. |
Top-rack dishwasher-safe |
| Larq Insulated Filtered Water Bottle |
Stainless steel |
Flip straw |
17 or 25 oz. |
Hand wash only |
| LifeStraw Go Water Filter Bottle |
Tritan plastic |
Chug |
22 oz. |
Dishwasher-safe with filter removed (hand-wash cover and mouthpiece) |
Best water bottles of 2026
Material:18/8 stainless steel | Cap:Standard mouth, wide mouth, flex straw or flex chug | Volume:24, 32, 40 or 64 oz. | Care:Dishwasher-safe
This water bottle is best forquick sips on the go and keeping water cold for long periods.
Why it's great:Hydro Flask is behind our best backpack cooler , so it's no surprise it also came out on top for its durable and convenient water bottle. Like all of the brand's accessories, the bottle is designed for mixing and matching, available in a wide assortment of colors, sizes and cap styles.
The pliable loop on the cap makes for agile carrying, while the Flex straw cap provides easy access for sipping. The double-wall vacuum insulation kept our drinks cold, and the entire water bottle is dishwasher-safe for easy cleaning.
How it's held up:I've owned and used Hydro Flask Insulated Water Bottles for several years, and they still look brand-new despite consistent cycles in the dishwasher. I haven't noticed any chipping or fading either.
Minor criticisms:The Hydro Flask Insulated Bottle is a bit of a splurge (though no more expensive than other popular insulated water bottles). But not a single Yahoo staffer who owns this bottle regrets the purchase.
- Insulated
- Spill-proof
- Dishwasher-safe
- Wide shade/lid selection
- Lifetime limited warranty
- Pricey
Material:Stainless steel | Cap:FreeSip spout with locking lid | Volume:16, 24, 32 or 40 oz. | Care:Lid is dishwasher-safe (hand-wash cup and straw)
This water bottle is best forthose looking to keep water cold for long periods, with the option to sip or gulp.
Why it's great:Want the ability to sip or swig? Allow us to introduce you to the Owala FreeSip, a Yahoo editor favorite for its multitasking lid and excellent temperature retention. The hero feature is a two-in-one spout with a built-in straw for sipping and a wider opening for chugging. We were also fans of the push-button cap, which protected the spout from leaking even when tossed into a tote.
The FreeSip is constructed from vacuum-insulated stainless steel and aced our cold-water test. After 24 hours, the temperature rose by 23°, which might sound like a lot, but was one of the best results we encountered. The 24-ounce bottle fits in a cup holder, plus Owala regularly releases new design iterations.
How it's held up:"I love my Owala so much that I own three of them," shares Yahoo's Style Editor Hannah Oh . She's used various viral bottles over the years, but the FreeSip is the only one that helped her build a hydration habit. "I'm quite picky about the temperature of my water, so the fact that it stays cold for a long time means I end up drinking so much more," she adds.
Minor criticisms:Although the FreeSip is technically dishwasher-safe, the brand recommends hand-washing the cup and straw. The water bottle also isn't meant for hot liquids, making it less versatile than similarly priced styles.
- Spill-proof
- Wide color selection
- Two ways to drink from one lid
- Does not accommodate hot liquids
- Lid is dishwasher-safe, but bottle isn't
Material:Glass with silicone sleeve | Cap:Flip | Volume:12, 16 or 22 oz. | Care:Dishwasher-safe (cap top-rack only)
This water bottle is best forquick sips on the go and for anyone who prefers a glass option with a protective barrier.
Why it's great:Glass bottles may be fragile, but they're also BPA-free and non-reactive, meaning the material won’t latch onto (or leak chemicals into) water or any flavored drinks (so you don’t need to worry about the flavor being altered or tasting bad). This bottle from Lifefactory makes glass even more appealing, thanks to its silicone sleeve. Available in four colors, it improves grip and is particularly helpful when the glass holds very cold drinks, which can create condensation around the outside.
The flip cap easily popped up and clicked closed, forming a tight, leakproof seal. The full lid screws off to reveal a wide mouth, which came in handy when we wanted to fill the (non-insulated) water bottle with ice cubes. It includes a sturdy strap that proved helpful for carrying the bottle, though we wish it were slightly larger.
Minor criticisms:Glass bottles typically weigh more than their stainless steel and plastic counterparts, and this bottle is no exception, weighing over a pound. It's also not insulated and did not perform especially well in our cold-water test.
- Spill-proof
- Dishwasher-safe
- Comes with a limited warranty
- Nontoxic material
- Not insulated
- Heavy
Material:Tritan plastic | Cap:Wide mouth, narrow mouth, lock top, Epic Filter or MultiDrink with straw | Volume:16, 24, 32, 38 or 48 oz. | Care:Dishwasher-safe
This water bottle is best foranyone who wants a lightweight container that holds a lot of water at once, with room for ice.
Why it's great:For a high-capacity yet lightweight plastic bottle, the Nalgene is the way to go. It weighs a tad over 6 ounces when empty and is made of partially recycled Tritan plastic, which is heavy-duty and impact-resistant.
The bottle has a wide mouth, making it easy to fill with water and big ice cubes (which you'll want to do since it isn't insulated). It's also dishwasher-safe, but testers were able to quickly hand-wash it with a sponge as needed.
The ridged cap offers a little extra grip, ensuring a tight seal even with wet hands, and it includes a connecting loop that hooks to chains and carabiners, making it a popular choice for hiking. The bottle also has measurement lines for tracking your intake, and it can be fitted with filter caps .
How it's held up:Home Editor Elizabeth Berry has brought her Nalgene (in Cherry Blossom) up Mount Washington and around multiple trails in upstate New York. She has even thrown it onto rocky terrain while climbing outdoors. It's the only water bottle she packs for long hikes and multi-day camping adventures, but it shows a significant amount of scratches after two to three years of use.
Minor criticisms:This plastic water bottle isn't insulated, but it's also the most affordable option on our list. Berry also finds the wide mouth leads to spills and dribbling, especially when she's taking large gulps in the car or while walking.
- Dishwasher-safe
- Big color/combo selection
- Wide mouth
- Budget-friendly
- Not insulated
- Shows scratch marks
Material:18/8stainless steel | Cap:Straw | Volume:20, 30 or 40 oz. | Care:Dishwasher-safe
This water bottle is best forcommuters who prefer to sip from a straw and anyone who prioritizes nontoxic materials.
Why it's great:Yahoo staffers love Yeti's Rambler collection , from the adorable travel mugs to the impressive tumblers that somehow still fit in car cupholders. Made of kitchen-grade 18/8 stainless steel, the Rambler Travel Straw Mug is our health editors' pick for the best nontoxic water bottle . It delivers on durability, functionality and convenience, keeping our drinks cold for hours.
As with many of the best water bottles, what sets this Rambler apart is its design. The straw lid makes drinking on the go easy, and it flips down to help prevent spills between sips. "The welded handle offers a secure grip, even when the mug is full, and I appreciated how easy it was to clean after a day of iced coffee," shares Contributing Nutrition Writer Lauren Manaker, RD .
All parts are dishwasher-safe for easy cleaning (especially if you sip liquids other than water), and the Yeti is available in a rainbow of hues to suit any aesthetic. You can stick to one color for all your drinkware or mix and match.
Minor criticisms:The Rambler is bulky like our other tumblers from HydoJug and BrüMate. If it's important to you that your water bottle fits in your cup holder, make sure to test it before you get rid of any packaging.
- Fits in most cupholders
- Double-wall vacuum insulation
- Leakproof seal
- Built-in straw
- Pricey
- Bulky
Material:Stainless steel | Cap:Flip straw | Volume:32 or 40 oz. | Care:Dishwasher-safe
This water bottle is best forcar rides and long periods of sitting out in the sun, as it has superior insulation.
Why it's great:This handled tumbler comes in 32- and 40-ounce sizes, both of which I can confirm fit in a standard cup holder. It's also available in a wide range of colors and patterns, including florals and geometrics. Bonus: A clear lid lets you see how much liquid you have left without opening it.
Aesthetics aside, the HydroJug Traveler keeps drinks cold for a full day (and then some). Even after 48 hours, the water temperature rose only 3° since the 24-hour mark. And with the lid properly sealed, this baby was extremely tight-lipped (even when turned upside down). Not a single drop of water escaped!
How it's held up:Yahoo's Senior Writer Ellie Conley has owned her HydroJug for a little over a year now and reports that it looks as good as the day she bought it. "Mine is even covered in glitter, and after putting it in the dishwasher, none of the sparkle has worn off," she adds.
Minor criticisms:The larger sizes are great for road trips and long commutes, but they also mean a chunkier water bottle. If you want something slim or lightweight that can also slide into a backpack or tote, consider a model without a handle instead.
- Insulated
- Clear, spill-proof lid
- Wide color/pattern selection
- Lifetime limited warranty
- On the pricer side
Material:Stainless steel | Cap:Straw | Volume:30 or 40 oz. | Care:Top-rack dishwasher-safe
This water bottle is best foranyone worried about leaks who prefers a handled cup and a built-in straw.
Why it's great:Large, handled tumblers have risen as the ultimate hydration accessory for their ability to keep water cold while still fitting in a car cup holder. (This is why they’re also often referred to as cruisers.)
What sets BrüMate’s insulated tumbler apart is its custom straw-locking dial that can be turned from "sip" to "sealed." The latter setting successfully prevented any water from escaping, making this cup truly leakproof, even when we turned it completely upside down and shook it vigorously.
The straw is made from stainless steel, making it more sustainable than plastic options and less delicate than glass options. We found the Era's angled handle to be more comfortable than traditional handles for carrying. What's more, the tumbler is dishwasher-safe and comes apart easily for cleaning.
How it's held up:Senior Health Editor Laura Williams has a surplus of these bottles in her kitchen cabinet. "We put them through the wringer," she says. "We have literally run over them, dropped them from heights and had them stepped on by a horse." These bottles remain her go-to, even when they've shown some wear and tear (and to be fair, her wear and tear is probably worse than most!).
Minor criticisms:At over $40, the BrüMate Era Tumbler is a splurge, but its durable construction warrants the price. The water bottle is also a great gift for anyone hoping to meet their daily water goals.
- Insulated
- Spill-proof
- Top-rack dishwasher-safe
- Lifetime warranty
- Pricey
Material:18/8 stainless steel | Cap:Original, sports or flip straw | Volume:9, 17 or 25 oz. | Care:Top-rack dishwasher-safe (hand-wash recommended for lid)
This water bottle is best fortoting around in the pocket of a backpack or work bag, thanks to its slim shape.
Why it's great:The S’well Original Bottle is popular for its sleek silhouette and eye-catching colors, ranging from sophisticated hues to earthy patterns and vibrant celestial motifs. Amazon currently has more than two dozen designs for sale! But there’s a lot more to this bottle than meets the eye.
As someone who’s owned a bunch of S’well water bottles, I can vouch that the bottle cap, when screwed on correctly and tightly, doesn’t leak, even when tossed in my work tote. The 17-ounce size fits snugly in a backpack water bottle holder for commuting or traveling, though there are smaller and larger versions.
In my experience, the triple-walled stainless steel body and tight-sealing screw-top lid provided strong insulation. It kept my water cold for more than 24 hours, without “sweating” on my desk. When it's time to head home, you can add a bottle handle for more secure carrying.
How it's held up:Commerce Director Jeanine Edwards has had her collection of S'well bottles for nearly a decade and happily reports they remain a travel must-have. The Original is "not overly bulky and doesn't weigh my bag down," she shares. While her bottles continue to keep water cold, Edwards has noticed that some of the paint has chipped or faded.
Minor criticisms:The S'well's narrow mouth makes it difficult to add ice. It's a good thing the bottle is triple-walled and vacuum-insulated; the brand says it can keep water cold for up to 36 hours.
- Insulated
- Spill-proof
- Wide color/pattern selection
- Lifetime limited warranty
- Narrow mouth for adding ice
Material:Stainless steel | Cap:Spout Lid with Ice Blocker or Straw Lid | Volume:22, 32, 40 or 64 oz. | Care:Dishwasher-safe
This water bottle is best forthose who are active and looking to sip cold water from an ice-blocking cap.
Why it's great:Similar to Hydro Flask, Takeya sells insulated water bottles that are relatively easy to clean. They also offer interchangeable cap styles, so you don’t need to purchase and store a bunch of different water bottles for different needs.
The Takeya Sport Water Bottle feels comfortable in the hand, and when properly closed, it didn't leak, even when we flipped it upside down. The lid twists off easily for quick fill-ups and has a carrying loop for convenience. Bonus: The spout-style lid has a built-in ice blocker, so ice won’t clog up the water stream when you’re drinking.
In our experience, the bottle is compatible with cup holders on treadmills and other workout equipment. In fact, our health editors named it the best gym water bottle for cardio machine workouts.
Minor criticisms:During our cold water test, the Takeya Sport didn't keep ice-cold water as close to its starting temperature as other bottles. The inside temperature dropped 29° after 24 hours. However, it did perform better in our hot water evaluation, keeping the near-boiling water pretty toasty for longer than the promised 14 hours.
- Spill-proof
- Dishwasher-safe
- Wide size selection
- 1-year limited warranty
- Did not keep water the coldest
Material:Tritan plastic | Cap:Chug | Volume:22 oz. | Care:Dishwasher-safe with filter removed (hand-wash cover and mouthpiece)
This water bottle is best forhiking, camping and traveling in general.
Why it's great:Securing our vote for the best travel companion is LifeStraw’s Go Water Bottle. It has a lightweight yet durable Tritan plastic body with a carabiner that clips securely to your bags and luggage. The straw is easy to drink from and verifiably leakproof when closed.
The main draw, however, is the bottle’s integrated filtration system, which promises to protect against 99.99% of bacteria and 99.99% of parasites. This feature is particularly helpful when charting new territory without access to a clean-water system or refilling at questionable water fountains.
The two-filter system incorporates an activated carbon filter and a membrane microfilter. The first lasts about 26 gallons, and the latter lasts up to 1,000 gallons, so you won’t have to worry about changing filters while traveling.
Minor criticisms:While the Go Water Filter Bottle is only available in a 22-ounce size, LifeStraw has a wide range of tumblers and collapsible water bottles in other sizes. Plus, the brand sells filtration straws , which are great to have on hand for outdoor adventures and emergencies.
- Lightweight
- Spill-proof
- Dishwasher-safe
- 3-year warranty
- Not insulated
- One size only, though the brand’s other collections offer additional sizes
Material:Stainless steel | Cap:Flip straw | Volume:17 or 25 oz. | Care:Hand-wash only
This water bottle is best fortraveling, especially in warm locations where insulation is essential for keeping your drink cold.
Why it's great:Our best splurge filtered water bottle , the Larq features activated carbon in the two-layer filter that traps contaminants like lead, chlorine, VOCs and other particulates, according to the brand. It uses custom Nano Zero technology to latch onto heavy metals, giving you access to purified water — even from a garden hose.
Aside from its filtration element, which the brand recommends replacing every 40 gallons or two months, the Larq Water Bottle features a durable stainless steel canister and a powder coating for added grip and sustainability. The cap offers additional leak protection, and the bottle keeps drinks cold for hours, as confirmed in our testing. We also like that there's a carabiner for attaching the water bottle to a tote or backpack when commuting.
Minor criticisms:If you have the money to splurge — or perhaps some loved ones to spoil — Larq's Insulated Filtered Water Bottle is a worthy investment. But a couple of bucks over $50 is still a hefty price to pay for a drinking vessel.
- Spill-proof
- 1-year limited warranty
- Two-layer filter
- Pricey
Can you ever have too many water bottles? Probably, but smart designs for certain activities convince us to give up cabinet space.
Factors to consider when choosing a water bottle
✓ Material:You've got several options, all of which should be fairly easy to clean.
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Stainless steel water bottlesare popular for their often indestructible frames and typically colorful, sweat-resistant coats. When insulated, they also keep drinks cold or hot for extended periods.
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Plastic water bottlesare tumble-friendly and usually the lightest to carry, making them a common choice for younger kids and longer treks. While not as shatter- or condensation-proof as stainless steel, many water bottles are made of Tritan plastic , a durable, BPA-free alternative to traditional plastic compounds.
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Glass water bottlestend to weigh more than their plastic and stainless steel counterparts, with an inclination to sweat and, with enough impact, break. That said, they're generally dishwasher-safe and made without any perceived toxins that can latch on or react to liquids (keep scrolling for more on water bottle safety.)
✓ Cap/straw:Chug caps are great for hearty gulps, while narrow mouths make for a more controlled sip. Traditional straw tumblers allow for more distance between you and your tumbler — and flip straws offer quick, discreet access for sneaking in sips when you're biking, hiking, etc. Because flip straw bottles can be folded down, they also help keep dirt and debris out. Interchangeable caps offer more versatility for evolving needs and growing families (they're also helpful for small spaces and traveling).
Tumblers galore! These cup-holder companions are easy to slowly sip from thanks to the included straws.
✓ Volume:Bigger cups mean fewer fill-ups, but they can get more burdensome to carry for longer periods of time. Look for a handle — or at least a cap loop — for more security, especially when traveling or driving, and ensure bottles are compatible with cup holders if you plan to take them for a drive.
✓ Care:The experts we spoke with say to wash your water bottle every day , so make sure to check the brand's care instructions. Dishwasher-safe water bottles make for easier, more effective cleaning. For bottles that are hand-wash only, you'll want to invest in some good bottle brushes if your bottle is hand-wash only, especially for options with narrow mouths.
How we test water bottles
We did a good amount of groundwork when approaching our best water bottle roundup ... after all, something as vital as water consumption shouldn't be taken lightly! We researched top brands in the industry, scouring through thousands of comments from verified customers to get a handle (get it?) on the water bottle styles and features that matter most. We then evaluated top styles according to the following tests:
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Durability:We purposely dropped plastic and stainless steel water bottles from high heights to assess for any damage.
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Leak resistance:We filled water bottles up with water and tipped them over to ensure that, when lids were closed, nothing seeped out.
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Maintenance:We ran water bottles labeled as dishwasher-safe through several dishwasher cycles to confirm they weren't compromised in the process.
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Cold and hot water insulation:We filled each of our top picks with ice-cold water and took its initial temperature with an infrared thermometer. We checked back in 24 and 48 hours to take its temperature again to evaluate how well each model kept its contents chilly. For water bottles that can handle hot liquids, we poured near-boiling water inside and repeated the same steps.
The Stanley IceFlow was filled with water and tipped over to gauge for leak-resistance. As you can see, it passed the test!
Other water bottles we've tested and liked
Below, a few honorable mentions for additional steel, plastic and glass water bottles that almost made the cut.
Stainless steel:
Stanley Ice Flow 2.0 : Chunkier water bottles can't always fit in a cup holder, but this one does, thanks to a tapered bottom. It proved completely leakproof with the flip straw folded down in our testing. Edwards also has the Ice Flow and describes it as "basically indestructible."
Hydro Flask Micro Mini : If you're looking for something small, this is as tiny as it gets. The adorable 6.7-ounce bottle isn't the most practical for daily hydration, but our tester described it as a versatile option for toting a double espresso or home salad dressing to work.
Yeti Rambler Bottle : For a jug-style bottle, this Rambler also ranks highly for insulation and durability. I've used mine for several years, and it remains in good condition, while the brand's equally tough and vibrant Jr. Rambler remains a hit with kids in my family.
FreeSip Sway , FreeSip Twist and FreeSip Tumbler : Since first publishing this guide, I've tested more water bottles from Owala's FreeSip collection and can confirm that these three cup holder-friendly vessels are similarly leakproof and insulated.
Glass:
Bkr Little Bottle : We liked how the sleeve on the Lifefactory Glass Bottle made for a more secure grip, and this pick has a similar silicone coating that Yahoo's health team recommends. The drawbacks are that this bottle is smaller and more expensive.
Flip-straw:
Bottle Bottle Insulated Water Bottle : The Stanley IceFlow's generous, sturdy handle is among the most comfortable we tested, and the slightly larger canister and straw really quench a thirst. But if you're on a budget and looking for a more affordable alternative, this pick comes with double-wall insulation and an extended flip straw for precise sips. When properly sealed, it also didn't spill during our testing.
Plastic:
Pogo's Plastic Water Bottle : While it isn't as light (or large) as Nalgene, and doesn't come in as many colors, Pogo fared well in our testing for those who prefer a more precise sip and/or cupholder-friendly option, still with measurements.
Filtered:
Brita's Stainless Steel Water Bottle : Larq got the top spot for its double filtration and sleek aesthetic. Though it features less frills, this Brita water bottle offers insulation, filtration and leak- and spout protection — and costs significantly less.
What about the Stanley Quencher FlowState?
The Stanley Quencher tumbler is great for keeping hydrated when working, driving and more. But the FlowState wasn't completely leakproof in our testing, which is why we gave the top-handled tumbler spot to the BrüMate Era.
Spilling the tea: In our testing, the Stanley Quencher FlowState Tumbler (right) drizzled water even when sealed, while the BrüMate Era remained completely leak-resistant. (Kristin Granero/Yahoo)
Other water bottles we plan to test
Sure, we've already tried over 120 bottles, but because there are always new options hitting stores, we regularly conduct additional testing. We're excited to try these new and noteworthy models:
All-star lineup: Owala's SmoothSip and FreeSip bottles allow you to sip or swig and are completely leakproof.
Water bottle FAQs
What water bottle material is best for your health?
Glass bottles are typically made without chemicals that can leach into liquids, making them a top choice for nontoxic water bottles (though they are more prone to breaking). Stainless steel bottles are a close second, provided they are made from food-grade, non-reactive materials such as 18/8 or 304 stainless steel.
Many major brands now commit to producing water bottles — including those made from plastic or silicone — without known or suspected harmful substances such as Bisphenol A (BPA) or lead . These products are often subject to regular testing and compliance with safety standards. By contrast, single-use plastic bottles have been linked with the presence of microplastics , which can potentially leach into the water over time and may pose health and environmental concerns.
Look for labels such as "BPA-free" and "lead-free," and contact brands directly if you need more detailed information. To keep your water bottles clean, we recommend using bottle brushes for narrow-mouth designs and placing bottles in the dishwasher when they are marked dishwasher-safe. With proper maintenance, filtered water bottles can offer an extra layer of protection against bacteria, microplastics and other potential contaminants.
How many bottles of water should you drink each day?
Medical studies suggest drinking 4 to 6 cups of water daily for healthy body function. That equates to 32 to 48 ounces, meaning you'd be just about covered with your 32-ounce or 40-ounce Stanley. This recommendation is for the average person on an average day, so you may need to increase your intake based on your personal needs and level of physical activity, replenishing more frequently when exercising aggressively.
Can I bring an empty water bottle through TSA?
Reusable water bottles are a great resource for staying hydrated and saving money while traveling (versus having to purchase single-use water bottles at the airport or your destination at an inflated rate). According to the Transportation Security Administration (TSA) , water bottles are approved for both checked and carry-on bags when containing less than 3.4 ounces of liquid. We recommend emptying bottles before going through security and replenishing them at a refill station to be safe.
Update, Oct. 26, 2026: We checked all prices and availability. Our No. 1 pick remains unchanged, but we added the best nontoxic water bottle from Yeti and removed a Stanley Tumbler from our top picks based on long-term testing. We also refreshed our superlatives, incorporated long-term feedback from testers and updated our testing process to reflect our current methodology.
We received complimentary samples of some products and purchased others ourselves, but we reviewed all products using the same objective criteria.
