The best water bottles of 2021 | CNN Underscored



With an infinite stream of water bottles making quite a few claims about technological improvements and insulating properties flowing into the market, it’s simple to get misplaced in all of the choices.

To find out which bottles are really price their price ticket, we culled 1000’s of insulated water bottles all the way down to 15 contenders after studying by means of evaluations and shopping bestselling bottles throughout the web. We then put them by means of a litany of checks to find out which is the best possible. (For extra on our testing course of, scroll down.) After two months of testing and consuming a complete lotta water, we narrowed down our picks to 2 bottles that stood out from the remainder.

Finest general water bottle

The Yeti Rambler got here out on high throughout our testing due to its stellar thermoregulation, superb sturdiness and implausible chug cap that provides you a cushty and fast consuming expertise, whereas sustaining easy accessibility to the superwide mouth.

Finest finances water bottle

The 21-ounce Wholesome Human Stein was a shock standout in our testing for its sturdiness and efficient thermoregulation. We did not love the lid, however you may add the non-compulsory Flip n’ Sip lid to make the consuming expertise simpler. Plus, it is available in a dizzying vary of colours and three sizes to suit most tastes and desires.

26-Ounce Yeti Rambler

Kai Burkhardt/CNN

26-Ounce Yeti Rambler

Whereas the Yeti Rambler is a bit on the pricier aspect, this water bottle is well one of the best one we examined. Not solely does it preserve your drinks scorching or chilly for hours and hours, it’s solidly sturdy and has one of the best lid we’ve ever examined. Plus, the Rambler is customizable, out there in 14 colours and 5 sizes (12-ounce, 18-ounce, 26-ounce, 36-ounce and 46-ounce) and it’s even dishwasher-safe.

Whereas there are different bottles with nice insulation which might be moderately sturdy, what pushes the Rambler previous every other choice in the marketplace in our eyes is its standard-issue chug cap. This lid is manufactured from two parts: one which screws into the bottle and incorporates a spout, and one other that twists on high of that to maintain it protected. This two-tiered system signifies that everytime you wish to take a swig of water, you may unscrew the highest and chug away out of the spout. However when it’s time to refill your bottle with water and ice, you may take the entire contraption off, revealing the Yeti’s ultrawide mouth.

The Yeti Rambler's Chug Cap

Kai Burkhardt/CNN

The Yeti Rambler’s Chug Cap

Different bottles we examined supplied spout lids, however these usually have to be bought individually, and none of them labored as seamlessly because the Rambler’s. The Rambler simply had the best consuming and filling expertise out of all of the bottles we examined due to this lid, which additionally retained little to no espresso taste after our checks.

Better of all, we love that with the Rambler you don’t have to surrender a lot on aesthetics to get top-notch efficiency. The Yeti bottle is available in a bunch of daring, trendy colours, together with a lightweight blue, an olive inexperienced and even an attention-grabbing pink. What’s extra, beginning at an additional $5 you may customise your bottle with all kinds of designs from plain textual content and monograms to state emblems and even logos you add your self.

The Yeti Rambler strikes the right steadiness between being a sturdy, insulated bottle you could take in your roughest adventures whereas nonetheless trying good when it’s standing in your desk. Its customizability, ease of cleansing and ingenious chug cap are all explanation why irrespective of the place you go, we predict you’ll love having a Yeti Rambler at your aspect.

21-Ounce Healthy Human Stein

Kai Burkhardt/CNN

21-Ounce Wholesome Human Stein

Hovering round $20 relying on which colour you select, this water bottle from Wholesome Human was one of many high bottles we’ve examined. Its counterpart, the Wholesome Human Curve, really gained our general finest spot final yr. The Curve has had some points with inventory and is typically laborious to search out, however fortunately the Stein is mainly the identical bottle because the Curve, simply with out the wavy design, which helped the bottle’s ergonomics however was a love-it-or-hate-it from the aesthetics aspect.

Together with the opposite bottles we examined this yr, the Wholesome Human did a superb job at retaining temperature, particularly over our shorter time intervals. Plus, throughout our first batch of testing it scored the very best out of all of the bottles we examined for sturdiness. After dropping it on its backside in addition to on its lid, the bottle barely confirmed indicators of abuse, apart from some paint chipping on the underside. It was one of many solely contenders that didn’t flip right into a wobbly vessel that would barely rise up. Coming in at 21 ounces, its success throughout the drop take a look at could have been as a consequence of it being one of many lighter choices, although the 26-ounce Yeti and different smaller bottles we examined didn’t carry out as nicely when given the identical remedy.

The place the Stein falls a tad quick is its lid and mouth. The mouth isn’t practically as huge because the Rambler’s, so whereas filling up the bottle isn’t a chore, it’s positively tougher to get ice in as rapidly as you may with the Yeti. The lid comes geared up with a carabiner and didn’t retain any bitterness after our espresso take a look at; nonetheless, it’s a easy screw-on lid, so that you drink instantly from the bottle’s mouth as a substitute of from a spout. You’ll be able to, nonetheless, purchase the Wholesome Human Flip n’ Sip lid for an additional $14.99, which makes the consuming expertise significantly better.

The Stein is available in 39 completely different colour choices and three sizes (16-ounce, 21-ounce and 32-ounce), with completely different availability relying on the scale you select. The choice isn’t restricted to base colours like different bottles, and consists of enjoyable designs akin to Mirage, Willow Oak and extra. The Wholesome Human Stein additionally is available in recyclable packaging, which is good for these motivated to purchase a reusable bottle to scale back plastic waste.

The Wholesome Human Stein is a stable bottle that may preserve your drinks scorching or chilly for so long as you want and gained’t instantly dent or break whenever you drop it. Its lid isn’t one of the best, however its colour choice and remarkably low value make it a bottle price shopping for.

For our 2021 replace, we retested a handful of top-performing water bottles, conducting one other spherical of thermoregulation checks and including a espresso take a look at to see if the bottles or lids retained any bitterness after being washed.

Most bottles we examined had comparable thermoregulation talents, so we measured over a shorter time period on this yr’s checks to imitate on a regular basis conduct. In our authentic testing, we measured scorching water after 12 hours and chilly water after 24, however this time we lower down the testing time to 6 hours for warm and 12 for chilly because you (hopefully) gained’t be consuming nine-hour-old espresso, and in case you’re maintaining in your each day consumption of water, it ought to positively be time for a refill earlier than the 24-hour mark.

Because the top-tier bottles have comparable thermoregulation talents, we paid extra consideration to issues that may have an effect on your expertise on a day-to-day foundation like sturdiness and drinkability. Our two winners have been the 2 most sturdy bottles we’ve ever examined, each popping out comparatively unscathed after being dropped thrice onto concrete.

We spent hours testing all 15 water bottles to ensure they met the calls for of on a regular basis use. That meant testing how lengthy they preserve water chilly, how lengthy they preserve water scorching, how they fare throughout a drop, how simple they’re to drink from and a lot extra. Right here’s a breakdown of what we examined and the way we did it:


  • Sizzling water take a look at: We poured water simply after it had completed boiling (beginning temps all measured inside a number of levels of one another, starting from 202.four to 207.1 levels Fahrenheit) into every of the bottles and measured the temperature with a liquid thermometer instantly after the pour, then after six hours and 12 hours. For our second spherical of testing we solely measured once more after six hours.
  • Chilly water take a look at: We poured faucet water from a sink on its coldest setting instantly into the bottles and measured the temperature (beginning temps all measured inside 1.four levels of one another, starting from 47.5 to 48.9 levels Fahrenheit) with a liquid thermometer instantly after the pour, then after 12 hours and 24 hours. Throughout our second spherical of testing, we crammed the bottle all the best way up with ice, then poured chilly water and measured the temperature after 12 hours.
  • Drinkability: We drank from the bottles’ customary caps each whereas standing nonetheless and strolling, noting how inclined every bottle was to spilling and splashing.
  • Leak take a look at: We shook the bottles, held them the wrong way up and threw them in a backpack for a commute to see if any water leaked.
  • Espresso take a look at: We poured freshly brewed espresso into every bottle and laid it on its aspect for a number of hours. Then we washed the bottle and lid and performed a style take a look at to see if both part retained any taste from the espresso.


  • Drop take a look at: We dropped every bottle thrice from 5 ft above concrete on its lid and thrice from 5 ft above concrete on its physique. We famous if the bottle was nonetheless usable (if the insulation or lid broke), then assessed the quantity of dents and different harm.
  • Cleanliness: We tried to scrub every bottle with a standard sponge, then with a bottle brush. On this take a look at, we additionally thought-about how rapidly we might add ice to the bottle.


  • Weight: We weighed every empty bottle in kilos on a meals scale.
  • Carrying choices: We famous any loops on the bottles, what number of average-size fingers match inside and the way snug it was to carry.
  • Grip: We felt the paint on every of the bottles and ordered them from least grippy to most.

S’nicely 25-Ounces ($45;

We beforehand named the S’nicely bottle one of the best bottle for holding temperature, however after reconsidering the way you’d use a water bottle in a day-to-day capability, figured that whether or not a bottle can retain temperature higher than others over 24 hours isn’t as essential as sturdiness and drinkability. Due to that, the S’nicely bottle dropped a bit in our rankings as a result of it received extraordinarily dented in our drop checks, and its small mouth means it’s lots tougher to scrub, and filling it up with regular ice is mainly unattainable.

Klean Kanteen TKWide ($39.95;

The wide-mouth model of Klean Kanteen solves the small-mouth downside on the usual Klean Kanteen bottle (which we additionally examined), and touts a big lid and a sturdier physique. It carried out amazingly within the authentic chilly water take a look at, coming in second behind the S’nicely, however didn’t do as nicely with scorching water. Should you’re not into the Yeti or the Wholesome Human, the Klean Kanteen TKWide can be our subsequent decide.

Hydro Flask Vast Mouth ($44.95;

A Hydro Flask is a Hydro Flask. Should you’re already set on shopping for one, you gained’t be dissatisfied, however we simply don’t suppose it’s the best choice on the market. It’s a great-looking bottle, however its efficiency wasn’t on par with most of the different choices we tried. The largest warning we’d give is to not drop the Vast Mouth model on its lid, as a result of it popped proper off and spilled water in all places throughout our checks. The primary time this occurred we thought it might be a defective lid, however after a second lid had the identical downside, we determined to pin it on poor design.

Hydro Flask Normal Mouth ($34.95;

The Normal carried out equally if not higher than the Vast. Plus, it’s smaller, which implies much less weight to hold round. You’ll be able to’t pour ice in as quick, however the smaller opening additionally means it’s simpler to drink from. Simply watch out about drops. After our checks it received so broken it misplaced its insulation talents.

Klean Kanteen Traditional ($39.95;

This Klean Kanteen had stellar performances with thermoregulation. The largest downsides have been the small mouth (with a weirdly tiny lid) and the truth that the physique received so broken it triggered the insulation expertise to fail.

CamelBak Chute Magazine ($36;

This bottle carried out fairly nicely, particularly with thermoregulation. The lid has a bit magnet so it doesn’t hit you within the face whilst you drink. Its greatest draw back: The cap broke off once we dropped it.

CamelBak Carry Cap ($36;

Should you’re contemplating CamelBak, go along with the Chute Magazine over the Carry Cap. The lid on the Carry Cap has an enormous loop, which is good to carry, nevertheless it snapped off fairly simply throughout the drops.

Miir Bottle ($29.95;

The Miir additionally did nicely in thermoregulation, outdoing each the Yeti and Sigg. Nonetheless, it misplaced favor throughout the drop take a look at, when the lid broke on the primary drop. We didn’t take a look at wide-mouth Miir bottles, solely the usual. Should you’re cautious, Miir is a good choice for a smaller, moveable bottle.

Sigg Sizzling and Chilly One Thermo Flask ($35.15;

This bottle carried out nicely throughout the temperature checks, nearly matching the Yeti Rambler. It’s a handsome bottle that includes a lid with a locking mechanism and a built-in tea filter. The place it actually fell aside was once we dropped it on that lid. It broke on the primary drop. You’ll be able to usually order alternative lids (although they’re out of inventory now), however in comparison with the opposite bottles it simply wasn’t sturdy sufficient.

Snow Peak Kanpai Bottle ($79.95;

This bottle is gorgeous, scoring the very best in pure design. Nevertheless it’s additionally costly and scored the bottom in our testing, particularly in thermoregulation, the place it had the third-worst rating after the Takeyas. The lid shattered on the drop take a look at.

Stanley Straightforward Clear ($23.59, initially $25;

This bottle carried out fairly nicely in maintaining water chilly, however not practically as nicely with scorching water. The lid additionally fared rather well throughout the drops, however the physique received giant dents on the underside. What introduced its rating down have been the little issues: not as many sizes, lids or colour choices; it was on the heavier aspect; and it wasn’t as simple to hold.

Takeya Normal ($24.99, initially $29.99;

The Takeya bottle underperformed with thermoregulation. The cap encompasses a nifty little spout for quick consuming that unscrews to disclose a large mouth, nevertheless it simply wasn’t sufficient to beat the poor insulation.

Takeya Energetic ($34.99;

The Energetic is mainly the identical because the Takeya Normal, with a number of good enhancements. Most notably is the rubber boot on the underside, which is nicely price the additional $5 if you wish to purchase a Takeya. Whereas it didn’t utterly eradicate dents, it made an enormous distinction and prevented any paint chipping on the underside.


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