Exclusive autoseal technology now in a handled desk mug. The autoseal fulton stainless steel desk mug uses the same leak-proof and spill-resistant autoseal technology as our other autoseal mugs, but features an autoseal button integrated directly into the handle of the mug. Just press the button on the handle to sip and release the button to seal. Our autoseal technology is combined with a double-wall, vacuum-insulated, stainless steel mug, providing exceptional temperature retention. Beverages stay hot for 4 hours or cold for 12 hours.