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