Take your steamy hot or ice cold beverages anywhere you go with Kyocera's ceramic coated interior, double wall vacuum insulated stainless steel travel mug. Kyocera’s travel mug features a thoughtfully designed safety lock lid making it spill proof. The lid can be opened with one hand and the unique exterior design is a delight to hold. The ceramic coated interior eliminates metallic taste, never rusts and will not stain. The wide mouth opening makes adding ice cubes very easy. It’s great for indoor and outdoor use including the kitchen, car, work, school, camping, hiking, hunting, picnics and more. Keep drinks hot or cold for at least 6 hours and up to 12 hours depending on the starting temperature of the liquid.