Hydro Flask

Hydro Flask Water Bottle - Insulated Stainless Steel - Non Spill Leakproof in 21 Oz Black

$25.14$34.95

487+ bought in the past month

About this item

  • 21 OZ BLACK BOTTLE: Fill and refill with the Hydro Flask Standard Mouth insulated water bottle with leakproof cap. With a comfortable, flexible handle, the bottle is easy to grab and take anywhere. Double-wall insulation keeps drinks cold up to 24 hours and hot for 12.
  • 24 HOURS COLD. 12 HOURS HOT: The insulated water bottle keeps drinks cold for 24 hours and hot for 12 thanks to double-wall vacuum insulation. TempShield insulation is designed to be lightweight and efficient temperature retention, keeping contents ready to sip.
  • LEAKPROOF: Say goodbye to leaky water bottles. The Hydro Flask Flex Cap is leakproof when closed. Toss it into your bag without worry.
  • FITS CUPHOLDERS: The cupholder-friendly design means your bottle fits seamlessly in most cupholders. Designed for seamless cupholder cohabitation, it's right at home on the open road, on the sidelines, in a pack or wherever you need to set your sips.
  • PURE TASTE: Durable pro-grade stainless steel ensures pure taste and no leftover flavor transfer. So, today's water won't have any taste of yesterday's iced tea.
  • DISHWASHER SAFE: Easy to use and easy to clean, just toss the lid and bottles into the dishwasher. Designed to keep bright color, being dishwasher safe means your favorite Hydro Flask is always at-the-ready.
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Product details
BrandHydro Flask
Capacity21 Fluid Ounces
ColorBlack
Recommended Uses For ProductWater
Special FeatureCold 24 Hours, Dishwasher Safe, Leakproof
Technical specifications
brandHydro Flask
capacity21 Fluid Ounces
colorBlack
recommended_uses_for_productWater
special_featureCold 24 Hours, Dishwasher Safe, Leakproof
age_range_descriptionAdult
product_dimensions1.12"W x 4.37"H
model_nameStandard Mouth Flex Cap Bottle
item_weight0.835 ounces
materialSTEEL
number_of_items1
patternSolid
included_componentsbottle, lid
product_care_instructionsHand Wash Only
base_diameter7.1 Centimeters
cap_typeFlex Cap
with_lidYes
is_dishwasher_safeYes
upc810497025680
manufacturerHydro Flask
global_trade_identification_number00810497025680
departmentgirls
item_model_numberSYNCHKG099288
best_sellers_rank#1,979 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #42 in Insulated Bottles #82 in Water Bottles
is_discontinued_by_manufacturerNo
date_first_availableMarch 31, 2013

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Customer reviews

4.713,775 ratings
  1. 588%
  2. 413%
  3. 30%
  4. 20%
  5. 10%

Customers say

Customers find the water bottle keeps water cold all day, is well-designed, and doesn't leak.

★★★★★

Love hydroflask! Great quality even with daily use

KadyJanuary 1, 2026

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. Read more

★★★★★

Reliable Hydration Bottle

desert ladyOctober 26, 2025

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. Read more

★★★★★

Hydroflask is a no brainer. Buy now.

SAGAR ADVANIDecember 18, 2025

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!! Read more

★★★★★

Hydro Flask Holds Temperature Well.

LeoNovember 16, 2025

My nephew had a Hydro Flask that he put hot coffee in when he left Arkansas and he said the coffee was still hot when the got to Houston, no less than 7 hours. That convinced me to at least look at them. I got one on sale that was a pink color and have been using it. My friends laughed when they saw the pink flask, but when they saw that it worked so well, they wanted one too, but one of another color. It fits in my cup holder, is easy to clean and small and light enough to fit anywhere . Read more

★★★★★

Better than most bottles

SkyNovember 20, 2024

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 Read more

★★★★☆

pretty good except pain comes off easily

wannabe perfectionist 💬July 10, 2025

I got this for my daughter and she likes it a lot. It's slim, pretty and retains the cold temperature pretty well. Only complaint is that the paint chips off easily... Read more

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★★★★★

Easily the best

mownhojOctober 22, 2025

This is easily the best water bottle or even thermos I've ever had in 58 years. It keeps water cold far longer than amy other water bottle I've ever had. Read more

★★★★★

Works great

DPRIMMNovember 4, 2025

My son dropped and dented his old one that came with the straw cap. I was hoping the straw cap would fit this one and it does, all is good great item even if they are a little pricy. Read more

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