Moosejaw Avex Stainless Thermal 20 oz. Blue 20 oz Capacity: 20 oz Double-wall vacuum-insulated technology means that this stainless steel mug keeps beverages hot for 7 hours, and cold for 20 hours This travel mug features patented AUTOSEAL technology for 100 leak-proof and 100 spill-proof performance One-handed operation for convenient drinking during activities - simply press the button to sip; release the button to automatically seal the mug Button locks to prevent accidental actuation when carrying inside bags or with other items