The Hydro Flask 24 Oz Wide Flex Straw Cap is a perfect companion for your hydration needs. The leakproof Flex Straw Cap makes it easy to drink from the bottle with one hand, while the wide mouth opening allows you to add ice cubes with ease. The double-wall vacuum insulation keeps your drinks cold for up to 24 hours and hot for up to 12 hours. The bottle is made of 18/8 pro-grade stainless steel, ensuring durability and no flavor transfer.