As Seen On TV, 16 OZ, Red Copper Coffee Mug, Tastes Best When Served In A Ceramic Mug To Go & Plastic & Metal Mugs Ruins The Taste, Keeps Your Coffee Fresh All Day Long & Will Never Taste Bitter Or Get Cold, Secret Is In The Dual Wall Fused With Our Exclusive Red Copper Mug Construction That Creates A Seal Inside The Mug That Will Make The Flavor Last All Day Long, Toss It In Your Bag & You Won't Spill A Drop, When You Get Where You're Going, Your Drink Will Still Be Hot, Holds Hot Or Cold.