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Hydro Flask21 oz Double Wall Vacuum Insulated Stainless Steel Leak Proof Sports Water Bottle, Standard Mouth with BPA Free Flex Cap, Black

Hydro Flask21 oz Double Wall Vacuum Insulated Stainless Steel Leak Proof Sports Water Bottle, Standard Mouth with BPA Free Flex Cap, Black

Q: Re Hydro Flask 24", what does "flex lid" mean?

no, you can't. if you watch the video it shows that you have to remove the lid to drink. i think the "flex" is in fact that the handle folds down, instead of being "fixed". you can get a lid that has a pop-up straw.

Q: Ok so does it come with little stickers?

Hi - Wendy here from Tall Ridge, the exclusive authorized seller of Hydro Flask products on Amazon - Thank you for your inquiry! Our Hydro Flask products do not come with stickers. I hope that answers your question.

Q: Curious... is the bottle supposed to be perfectly round all the way up and down? i just received mine from amazon and it is not. it feels oblong.

Yes, it should be perfectly cylindrical (round) all the way up. If it's not, there is an issue, and I would think that the company would take care of it. To tell if it's in fact round, remove the cap, make sure it's empty, place it on its side on a flat surface, and roll it.

Q: I just bought this hydroflask in the color olive. Is it normal for the lid to have to be forced to close all the way? It doesnt close easily

How did this work out for you? I'm experiencing same problem? I know it's not normal as I have been using this brand for a couple years now. Did u keep and use?

4.7/5

Product ID: 277980613

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Details

Brand
Hydro Flask
Capacity
21 Fluid
Colour
Black
Recommended uses for product
Water
Special features
Dishwasher

🔒Leak-proof BPA-free flex cap

🔥Keeps drinks hot up to 12 hrs

❄️Keeps drinks cold up to 24 hrs

Frequently Bought Together

Hydro Flask Standard Flex Cap Black 21 Oz

Hydro Flask Flex Boot - Accessory Silicone Water Bottle Protector - Dishwasher Safe, BPA-Free, Non-Toxic Small

Hydro Flask Standard Mouth Lids- Accessory for Standard Mouth Water Bottle

Description

💧 Stay cool, stay hot, stay unstoppable with Hydro Flask.

LEAK PROOF FLEX CAP - No spills, no stress—secure your hydration on the move with confidence.
COLOR LAST POWDER COAT - Sweat-free, extra-grip finish that looks sleek and lasts through every adventure.
PRO GRADE STAINLESS STEEL - Durable, flavor-pure metal that stands up to your active lifestyle and daily grind.
TEMP SHIELD VACUUM INSULATION - Lock in your perfect sip—cold or hot—for hours without sweat or heat on the outside.
DISHWASHER SAFE ECO FRIENDLY - Easy to clean and built to last with a lifetime warranty—sustain your style and the planet.

The Hydro Flask 21 oz water bottle features TempShield double-wall vacuum insulation to keep beverages cold for 24 hours or hot for 12 hours. Made from pro-grade stainless steel with a leak-proof BPA-free flex cap, it offers durability, flavor protection, and a sweat-free powder coat finish. Dishwasher safe and backed by a limited lifetime warranty, it’s designed for active professionals who demand reliable hydration on the go.

Specifications

Brand	Hydro Flask
Model Number	S21SX001
Color	Black
Product Dimensions	2.85 x 2.85 x 11.1 cm; 23.68 g
Capacity	21 Fluid Ounces
Material	Stainless Steel
Special Features	Vacuum Insulated, Dishwasher Safe, Double Wall
Item Weight	23.7 g

Have a Question? See What Others Asked

Re Hydro Flask 24", what does "flex lid" mean?

Ok so does it come with little stickers?

Curious... is the bottle supposed to be perfectly round all the way up and down? i just received mine from amazon and it is not. it feels oblong.

I just bought this hydroflask in the color olive. Is it normal for the lid to have to be forced to close all the way? It doesnt close easily

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

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€ 78.12

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