Hydro Flask 21oz Flex Straw Cap - Rain

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Size: 21OZ

Colour: RAIN



More hydration for more fun with our leakproof, Flex Straw Cap. Our 21oz 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.

The way in which the Hydro Flask can be used will change due to the straw lids conditions of use. Our 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.

  • 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
  • Free from toxins, free from worry


Volume 21oz - 621 ml
Mouth Diameter 4.8 cm
Diameter 7.2 cm
Height 23.8 cm
Weight 320 g 


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