Refresh on the go with this insulated, stainless steel water bottle and leakproof Flex Straw Cap. The leakproof straw is easy to open and close one-handed, providing a convenient way to easily grab a sip. The bottle easily fits ice cubes to keep things cool. 24 hours cold. TempShield®? double-wall vacuum insulation keeps temps regulated. Leakproof when closed. Won't retain odor or leftover flavor. Dishwasher safe, easy to clean. Durable stainless steel. Bottle fits most outdoor water filters. BPA-Free. Flex Straw Cap not intended for use with hot liquids. Not for use on a stove, in a microwave or freezer. Keep hot drinks out of the reach of children. Bottle fits all Wide Mouth caps and lids, including the Flex Straw Cap, Flex Cap, Flex Sip Lid for coffee and Stainless Steel Flex Cap. 32-40 oz Flex Straw Bottles fit Medium Bottle Boot. 24 oz Flex Straw Bottle fits Small Bottle Boot. All the colors, only from Hydro Flask.