Flip it and sip it.A cupholder-compatible water bottle with leakproof Flex Straw Cap and boot—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.24 hours cold 12 hours hotTempShield®? double-wall vacuum insulationDishwasher safeLeakproof when closedPure taste no flavor transferFits most cupholdersDurable stainless steelBPA-FreeDishwasher safeFlex Straw Cap not intended for use with hot liquidsNot for use on a stove in a microwave or freezer