Flip it and sip it with the Hydro Flask 40 oz Wide Mouth Bottle With Flex Straw Cap. With a comfortable, flexible handle, the closeable, leakproof straw cap is easy to open and close with one hand, for on-demand hydration. Double-wall insulation keeps drinks cold up to 24 hours for cool refreshment. The insulated bottle easily fits ice cubes and is dishwasher safe. 24 hours cold TempShieldA(R) double-wall vacuum insulation Leakproof when closed Pure taste, no flavor transfer Wide Mouth opening is ice-cube friendly 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