This is a sturdy vacuum insulated double wall drinking mug for hot drinks up to 5 hours and cold drinks up to 12 hours this stainless steel mug is 100 spill leak proof thanks to the patented autoseal technology automatically seals between sips to ensure no spills press to sip release to seal lid pivots open for easy cleaning also drinking is conveniently one handed thanks to the easy dimensions height20 cm width7 cm volumecapacity470 ml item details 100 spill