Sealing Washer, Fits Bolt Size 5/16 in EPDM/Steel, Galvanized Finish, 25 PKMfr #: 9084433 This holds 14 oz worth of liquid and comes with an easy grip handle and thumb rest. The tapered bottom fits in a standard cup holder. Lid has slide opening and slanted drinking surface. Made out of stainless steel for durability. Since it's made out of stainless steel it is not microwave safe. Thick DOUBLE WALL helps keep hot drinks hot and cold drinks cold far longer than the average mug. The image is printed with only the highest