Powder coated stainless steel 22 oz. double wall tumbler with a cork bottom. The cup's built-in cork bottom serves as a coaster and prevents the cup from sliding around on smooth surfaces. Comes in a variety of colors. Keep drinks hot for up to 8 hours and cold for up to 12 hours. With its standard fitting design, you can take your insulated java mug with you wherever you go. The tumbler's diameter is a standard 3 inches, so it will fit in virtually any car's cup holder. This item does not contain any BPA, phthalates, lead, or other harmful chemicals. They are constructed of food-grade materials that have been FDA-approved and passed California Proposition 65.