Monster Jam Childrens Birthday Party Supplies - Truck Tire Plastic Sippy Cup with Straw (8) Includes 8 Monster Jam Truck Tire Molded Plastic Sipper Cups with Straw. Holds approximately 16 oz. Add additional party tableware, kits, decorations, favors, games, and activities to complete your celebration and entertain your guests. Great for childrens birthday parties, kids school parties, a pizza party, sleepovers, prizes, favors, or a theme party. Features favorite monster truck, Grave Digger! Look for products featuring other trucks such as Monster Mutt, Max-D, and El Toro Loco.