

💧 Stay cool, stay hot, stay unstoppable with Hydro Flask.
The Hydro Flask 21 oz Standard Mouth Flex Cap bottle features double-wall TempShield insulation that keeps beverages cold for 24 hours and hot for 12. Its leakproof cap and flexible handle provide secure, easy portability, while the cupholder-friendly design fits most holders for seamless daily use. Made from durable stainless steel, it preserves pure taste without flavor transfer and is dishwasher safe for effortless cleaning.














| ASIN | B01KXHIWL8 |
| Age Range (Description) | Adult |
| Base Diameter | 7.1 Centimeters |
| Best Sellers Rank | #631 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #26 in Insulated Bottles #36 in Water Bottles |
| Brand | Hydro Flask |
| Cap Type | Flex Cap |
| Capacity | 21 Fluid Ounces |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (14,003) |
| Date First Available | March 31, 2013 |
| Department | girls |
| Global Trade Identification Number | 00810497025680 |
| Included Components | Lid |
| Is Discontinued By Manufacturer | No |
| Is Dishwasher Safe | Yes |
| Item Weight | 0.835 ounces |
| Item model number | SYNCHKG099288 |
| Manufacturer | Hydro Flask |
| Material | STEEL |
| Model Name | Standard Mouth Flex Cap Bottle |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 1.12"W x 4.37"H |
| Recommended Uses For Product | Water |
| Special Feature | Cold 24 Hours, Dishwasher Safe, Leakproof |
| UPC | 810497025680 |
| With Lid | Yes |
K**Y
Love hydroflask! Great quality even with daily use
My husband loves hydroflask and he needed one that seals well and travels easy. This worked perfectly. It fits in any cup holder we've encountered and the top hasn't leaks on him so far. It gets daily use so the lid quality seems good. The color is true to the photos. His water stays cold all day and even longer. The handle on the lid means he can comfortably attach it to his backpack too.
D**Y
Reliable Hydration Bottle
I’ve been using Hydroflask since the release. I believe it was 2009 when I purchased my first bottle. Hydroflask has gone through quite a few changes, design wise, changing ownership and adding products. It’s still my go-to hydration bottle. There are probably other bottles on the market equal to Hydroflask but it’s a brand I have found to be reliable. My water stays cold, it doesn’t leak and it can take an occasional drop. The 21oz fit easily into my bag and isn’t to heavy to carry if I’m holding it. I like the matte finish so it isn’t slippery in the hands. The lid quality is good and the handle is easy to grip and hold. A bottle brush fits easily into the bottle for cleaning and the “O” ring on the lid can be removed to scrub it and keep it from getting gross. Overall I highly recommended Hydroflask products.
M**P
Perfect bottle
Nicely packaged to prevent any denting. Water bottle is a nice color and will replace my 6 year old Hydro Flask. I love it that these bottles aren’t too heavy, yet they keep items nice and cold. They also are the perfect size for cup holders.
M**Y
Unparalleled performance
I recently purchased the Hydro Flask and I am absolutely thrilled with my purchase! This sleek and stylish water bottle not only looks great, but it also delivers exceptional performance. The double-wall vacuum insulation keeps my beverages at the perfect temperature for hours. Whether it's a hot cup of coffee in the morning or a refreshing cold drink in the afternoon, the Hydro Flask maintains the ideal temperature with remarkable consistency. One of the standout features for me is its durability. The stainless steel construction feels incredibly sturdy, and it has survived a few accidental drops without a scratch. The powder-coated finish not only adds a premium touch but also provides a secure grip, preventing slips even when my hands are wet. I also appreciate the thoughtful design details. The wide mouth makes it easy to clean and fill, and it's compatible with various accessories like straw lids and coffee flasks, adding versatility to its functionality. The leak-proof design gives me peace of mind, allowing me to toss it in my bag without worrying about spills. In summary, the Hydro Flask has exceeded my expectations in terms of performance, durability, and style. It's not just a water bottle; it's an investment in quality and a statement of conscious living. I highly recommend it to anyone seeking a reliable, stylish, and eco-conscious hydration companion. Cheers to staying hydrated in style!
S**Y
Better than most bottles
As someone who’s always on the go, my Hydro Flask has become an essential part of my daily routine. The insulation is no joke—it keeps my water ice-cold during long training sessions and my coffee piping hot when I’m heading to early morning workouts. What really stands out to me is how durable it is; I’ve dropped it more times than I can count, and it barely has a scratch. The wide mouth design makes it easy to fill with ice or clean after a long day, and the sleek design fits perfectly in my gym bag or car cup holder. I also love how it doesn’t sweat, no matter how cold the contents are, which is a huge plus when you’re carrying it around all day. For athletes, travelers, or anyone who values convenience and performance, the Hydro Flask is worth every penny. It’s not just a water bottle—it’s an investment in staying hydrated and fueled no matter where life takes you
A**N
Beautiful design, great color, keeps drink cool, beware of shipping damages
I ordered 2 bottles in same color. First one arrived nicely but second one arrived dented so I had to return it. The following review is for the first bottle which arrived in good condition. I would give 5 starts but considering the second purchase, I give 4 stars since it was expensive but damaged. Gladly I could return it for free thanks to Amazon. I love this water bottle for its design and quality. Other bottles look super clunky and look like they are designed to be taken on an expedition though the woods. I use this every day for school and I love it. One drawback however is that the 24oz is not enough for me. I didn’t want to buy the 32oz version since it is very large, I went for the 24oz because it is slim and tall and fits in my bag. I wish they had a slim version of 32 oz one. Regardless, I am able to get through 1/2 of my day on 24oz then I have to refill a few times. Otherwise I love this bottle and can see it lasting me a very long time. One other thing to note is that it seems susceptible to dings and scratches, especially on darker colors. I would recommend buying the hydro flask bottle boot for protection and noise reduction when setting down.
S**I
Hydroflask is a no brainer. Buy now.
Perfect gift for Christmas. Perfect size. Bought this as I trust the brand and have bought numerous bottles from hydroflask before. It's easy to use and does not leak. High quality. Dishwasher safe I guess. Let's goo!!
C**R
Nice quality, beautiful bottle. The cab has rubber seals, which doesn’t create noise when using, love it.
A**.
Justo lo que esperaba, Hydro Flask es calidad y garantía
R**I
روعه تحفظ البروده ومافيها طعم
T**I
Bellissima borraccia, leggera ed estremamente efficace. Tiene sia caldo che freddo in maniera TOP
K**S
Excelente marca, puedes hacerle grabado láser
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