Flip it and sip it.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 coldTempShield double-wall vacuum insulationLeakproof when closedPure taste no flavor transferWide Mouth opening is ice-cube friendlyFlex Straw Cap not intended for use with hot liquidsNot for use on a stove in a microwave or freezerBottle fits all Wide Mouth caps and lids