More hydration for more fun with our leakproof, Flex Straw Cap. Our 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: This does mean that the way the bottle can be used will change due to the straw lid conditions of use. Our straw lids are designed to be used with cold liquids only. Storing of carbonated liquids in the configured bottle can create pressure build up and affect the straws ability to remain leak proof. Product Benefits Flex Straw Cap makes cold refreshment that much easierFlex Straw Cap is leakproof when closed, to transport without worryFlex Strap is easy to transport and comfortable to carryHoneycomb Insulated Cap Insulated Cap for maximum temperature retentionMade with 18/8 pro-grade stainless steel to ensure durability, pure taste and no flavour transferTempShield ? double-wall vacuum insulation keeps beverages cold up to 24 hours.Colour Last powder coat is dishwasher safe, keeping your bottle slip-free and colourfulDishwasher safeBPA-Free & Toxin-FreeFree from toxins, free from worryCare and Use Not for use on a stove, in a microwave or freezer.Not intended for use with carbonated beverages.Flex Straw Cap not intended for use with hot liquidsKeep hot liquids out of the reach of children.Please see our standard mouth flex lid bottle or purchase a standard cap for hot liquid use!