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Tough, insulated and able to fit in the pocket of a backpack, a cup holder in your car or even on your climbing harness, this little bottle is one of Hydro Flask's most versatile in their range. 
Tough, insulated and able to fit in the pocket of a backpack, a cup holder in your car or even on your climbing harness, this little bottle is one of Hydro Flask's most versatile in their range. 
Hydro Flask

Hydro Flask 21oz Standard Mouth Flex Cap Black

£27.96 £34.95 20% off
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

90-day returns period

We hope that you are perfectly happy with your order from Trekitt, but we understand that you may want to return your purchase. We offer a 90 days return period from the date of purchase, and endeavour to process all returns within 48 hours of receipt.

We do not offer a free returns service. Therefore, all customers are responsible for any postage costs when returning any goods (excluding warranty returns).

For your convenience, follow here to the Royal Mail Returns Portal to arrange return postage for your items. This is not a Trekitt operated service.

The Trekitt Returns Policy Includes...
A 90 day return period and the Trekitt 2-year Common Sense Guarantee.

Exemptions
PPE (Facemasks, Climbing Equipment etc. ), Food Goods, Accessory Cord, Socks & Underwear can only be returned if they have not been worn and/or removed from their original packaging with all swing tags still attached. If there is any sign or possibility that the goods have been used, tampered with or contaminated in any way, then we cannot accept a return on the grounds of consumer safety. Zips are typically not covered under a manufacturer's warranty.

The above does not affect the Consumer Contract Regulations. Click here to read more.

Hydro Flask 21oz Standard Mouth Flex Cap Black

Season:2024W C OFFER

Brand:Hydro Flask

Code:S21SX001

So let's start with the insulation. Hydro Flask uses TempShield, a double wall, vacuum insulated technology that guards the temperature of any drink, meaning cold stays cold for up to 24 hours and hot stays steaming hot for up to 12 hours. TempShield also guarantees no condensation or heat transfer to the outside of the bottle.

All of Hydro Flasks products are made with 18/8 pro-grade stainless steel which works wonders for taste. This top quality stainless steel protects against any flavour transfer which means that after a quick rinse you can use the same flask for multiple different drinks throughout the day and it won't taste like stale coffee. It is super easy to clean (yes, even if you accidentally leave it half-full of coffee in your car over a hot weekend) and is also BPA-Free and Phthalate-Free.

The slip-free proprietary powder coating makes your bottle much easier to carry and keeps your bottle secure in your hand. The bottle comes with a fully insulated flex cap but also works exceptionally well with Hydro Flasks insulated Sport Cap. And if you need any more convincing (although I'm not sure you do), Hydro Flask comes with an easy, hassle-free lifetime warranty, meaning you get peace of mind and can enjoy your flask for years and years.

  • Lightweight
  • Versatile, middle-of-the-road size
  • TempShield insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours
  • Durable 18/8 Pro-Grade Stainless Steel construction
  • BPA-Free
  • Phthalate-Free
  • Compatible with Standard Mouth Insulated Sport Cap (sold separately)
  • Lifetime Warranty
Technical Information

Weight: 320g

Volume: 621ml

Material: 18/8 Pro-Grade Stainless Steel

Sizing Information
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