The 21 oz Standard Mouth with Flex Straw Cap is just the right size for staying hydrated before, during and after activity. Beverages stay cold for 24 hours. The Flex Straw Cap is leakproof and makes it easy to sip on the move.

Please note:

The way in which the Hydro Flask can be used will change due to the straw lids conditions of use. The straw lids are designed to be used with cold liquids only.

Storing of carbonated liquids in this configured Hydro Flask can create pressure build up and affect the straws ability to remain leak proof.

FEATURES

Flex Straw Cap makes cold refreshment that much easier
Flex Straw Cap is leakproof when closed, to transport without worry
Flex Strap is easy to transport and comfortable to carry
Honeycomb ™ Insulated Cap Insulated Cap for maximum temperature retention
Made with 18/8 pro-grade stainless steel to ensure durability, pure taste and no flavour transfer
TempShield ®️ double-wall vacuum insulation keeps beverages cold up to 24 hours
Color Last™ powder coat is dishwasher safe, keeping your bottle slip-free and colourful
Dishwasher safe
BPA-Free & Toxin-Free

SPECS

Volume: 21 oz - 621 ml

Mouth Diameter: 1.91" - 4.8 cm

Diameter: 2.87" - 7.2 cm

Height: 9.4" - 23.8 cm

Weight: 11.3 oz - 320 g

HYDRO FLASK 21oz Standard Mouth (621ml) with Flex Straw Cap

Available Options

Have a question?