Don't let thirst disrupt your adventures. Easy to fill and simple to sip, the Hydro Flask 40oz Wide Flex Straw Cap Bottle keeps your drinks cold for up to 24 hours. Its leakproof Flex Straw Cap opens up to add ice and flips to sip. Perfect for daily use, the Hydro Flask 40oz Wide Flex Strap Cap Bottle supports your goals! 24 hours cold, 12 hours hot TempShield double-wall vacuum insulation Leakproof when closed Fits most cupholders Pure taste, no flavor transfer Wide Mouth opening is ice-cube friendly Color Last powder coat stays clean and colorful Bottle fits most backcountry water filters BPA-Free Dishwasher safe Flex Straw Cap not intended for use with hot liquids Not for use on a stove, in a microwave or freezer Bottle fits all Wide Mouth caps and lids.