20oz Coffee Tumbler Mug is with Double-Walled vacuum technology which can keep coffee warm for 6+ hours, beverages cold for 12+ hours. Stainless Steel Tumbler Cups are made of Food-Grade 304 stainless steel and the lid is made of BPA-Free materials. The interior is electropolished, the outer layer is coated with anti-sweat powder to keep your tumbler dry and clean. The surface of the thermal coffee mug is polished and powder coated, and the mug has a better texture. It is suitable for most car cup holders, and you can use it very comfortably. The insulated tumblers are suitable for many occasions, can be used for travel, party, garden, beach. What’s more is the high quality coffee mug which can be used as Christmas, Thanksgiving, Father’s Day, Mother’s Day gift for women or parents.