This is a sturdy vacuum insulated double wall drinking mug for hot drinks up to 6 hours and cold drinks up to 12 hours this stainless steel mug is leak proof thanks to the patented snapsealtm technology it comes with a special reservoir and rubber sleeve for comfort so you can sip your hot drink also drinking is conveniently one handed thanks to the easy lever slide up to open or down to close dimensions height18 cm volumecapacity470 ml item details leak pro