The Contigo West Loop Stainless Steel Travel Mug with AUTOSEAL Lid Stainless Steel , 20 fl oz. is made for the modern movers, shakers, commuters, travelers, and urban explorers in all of us. The ultimate on-the-go convenience, this thermal coffee mug is leak- and spill-proof thanks to AUTOSEAL technology. Press a button to drink and release to seal after every sip. THERMALOCK™ vacuum insulation keeps liquids piping hot up to 7 hours or icy cold up to 18. The Easy-Clean Lid pops open completely when you're done drinking, letting you get into all the nooks and crannies for thorough cleaning. The innovative lid is also one connected piece, so there are no parts to misplace when you toss it on the top rack of your dishwasher. Stainless steel bodies are hand-wash only.