Avex 16 oz Highland Autoseal Stainless Insulated Travel Mug Double-wall vacuum-insulated technology means that this stainless steel mug keeps beverages hot for 5 hours, and cold for 14 hours This travel mug features patented AUTOSEAL technology for 100% leak-proof and 100% spill-proof performance with button locks to prevent accidental actuation when carrying inside bags or with other items One-handed operation for convenient drinking during activities - simply press the button to sip; release the button to automatically seal the mug Exclusive, patent-pending, dishwasher-safe base design grips table tops and reduces clanking Sleek design fits most car cup holders