24 oz Wide Mouth water bottle with Hydroflask's leakproof Flex Straw Cap—easy to fill, easy to drink. Open it up, add your ice, and flip to sip. The insulated stainless steel keeps it cold for up to 24 hours. TempShield double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12 Insulated Flex Straw Cap is leakproof when closed Made with 18/8 pro-grade stainless steel for durability, pure taste and 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