The Stanley CLASSIC 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. What's new is that the drinking mug made of 18/8 stainless steel now has a transparent lid made of unbreakable Tritan plastic, which is even more comfortable to drink from. The CLASSIC CAMP MUG, painted in the colour ash, is dishwasher safe and all parts are BPA-free.