Monster Truck Tractor Tire Childrens Birthday Party Supplies - Truck Tire Plastic Sippy Cup with Straw (8) Includes 8 Monster Truck Tractor 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. Perfect for your Monster Jam, John Deere Tractor, racecar racing party, or Blaze and the Monster Machines party!