Whether travelling across a hot desert, over a cold tundra, camping in your back garden or just commuting to work you want to have the appropriate drink to hand. The Westloop Autoseal Mug has Vacuum Insulated Technology that keeps beverages hot for up to four hours or cold for up to twelve hours. With the patented Autoseal system you push to sip and release to seal. It automatically seals between sips which means no spillages, no leaks, no problems. The lid opens for easy cleaning and mugs are BPA free.