Mario Childrens Birthday Party Supplies - Red Mushroom Plastic Sippy Cup with Straw (8) Includes 8 Red Mushroom 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. Perfect for your Super Mario birthday party!