NO LEAKS OR SPILLS: AUTOSEAL lid locks between sips and is 100% leak- and spill-proof TEMPERATURE CONTROL: Drinks stay hot up to 11 hours or cold up to 24 hours with THERMALOCK vacuum insulation CLEANS UP NICELY: Easy-Clean Lid is top-rack dishwasher safe, while body can be washed by hand DRINK WITH EASE: Bottle can be held, locked, and released with one hand FITS YOUR LIFE: Built to fit in most car cupholders and under most single-serve brewers SAFE-TEA FIRST: Lid has inner hook for tea bags so you can avoid wet, messy strings and leaks PEACE OF MIND: BPA Free; Comes with limited lifetime guarantee for Canada & U.S.