The Stanley STAY HOT CAMP MUG in the new design keeps hot drinks hot for up to 1.5 hours and cold drinks cold for up to 3 hours with its double-walled stainless steel vacuum insulation. The mug is made from 18/8 stainless steel and has a lid made from shatterproof Tritan plastic, making it even more convenient to drink from. The STAY HOT CAMP MUG is dishwasher-safe and all parts are BPA-free.