
21 oz (621 ml) Standard Mouth with Sport Cap
Hydration on the go
They're pretty much the perfect pair: our 21 oz (621 ml) Standard Mouth Bottle and our insulated Sport Cap. Together, they're your go-anywhere hydration companion. It stashes easily in a small shoulder bag, your pack’s side pocket or your car cup holder, and holds enough to keep you going for hours without weighing you down.

TempShield™
Our unique double-wall vacuum-insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot, so you can stay refreshed for any adventure.


Pro-Grade Stainless Steel
Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavour transfer – and the durable construction stands up for whatever life brings.
Proprietary Powder Coat
Our proprietary powder coat means an easy-grip, sweat-free and extra-durable bottle that you can take anywhere.

Product Benefits
- Versatile, middle-of-the-road size, equipped with our insulated Sport Cap
- TempShield™ insulation eliminates condensation and keeps beverages cold for up to 24 hours and hot for up to 12 hours
- Durable 18/8 Pro-Grade Stainless Steel construction
- BPA-Free and Phthalate-Free
- Compatible with our Standard Mouth Flex Cap
- Lifetime Warranty
- Sport Cap is not intended for use with hot liquids and is not leakproof
Size and Dimensions
21 oz (621 ml) | |
---|---|
Volume | 621 ml |
Mouth Diameter | 1.91" |
Diameter | 2.87" |
Height | 10.4" |
Weight | 11.3 oz (320 g) |
We have great faith in our products
Hydro Flask guarantees this product with a limited lifetime warranty against manufacturer defects.
Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:
-
92 Non-profits supported non-profits.
-
$1.5 million Dollars (approx. £1.197 million) donated donated.
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26,043 Bottles donated bottles.
Is this the hydro flask 2.0?
When is the frost 21oz standard mouth bottle coming again. Is it going to be on sale again when it comes out.
So I have been wanting to buy I hydro flask for I really long time. So my dad told me I could buy one I like the 21 oz standard mouth bottle w/ sport cap l Hydro flask. So this is my question does the hydro flask 21 oz come with the sport cap or no lid.
Does this bottle fit in most car cup holders?
Per your answer on china vs USA manufacturing which lids are made in the USA?
Are all Hydro Flasks dishwasher safe?
I would like to know if you guys still sell the mint colored 21oz standard mouth bottle. Also, do you guys bring back old colors? It was my favorite but I lost it and I can't see myself without that lovely color!
Can I order this bottle but with the flex-cap? I noticed that they don't offer the 21oz Standard Mouth w/ flex cap in the "frost" color.
Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:
-
92 Non-profits supported non-profits.
-
$1.5 million Dollars (approx. £1.197 million) donated donated.
-
26,043 Bottles donated bottles.