The Contigo AUTOSEAL West Loop Vacuum-Insulated Stainless Steel Travel Mug, 16 oz., is made for the modern movers, shakers, commuters, travelers, and urban explorers in all of us. The ultimate in on-the-go convenience, this thermal coffee mug is leak- and spill-proof thanks to AUTOSEAL technology. With one hand, press a button to drink and release to seal after every sip. THERMALOCK dual-wall vacuum insulation keeps liquids piping hot up to 5 hours or icy cold up to 12. The innovative lid is also one connected piece, so there are no parts to misplace when you toss it onto the top rack of your dishwasher. Stainless steel bodies are hand-wash-only.