21st Birthday Gift Celebrating 21 Years 2 Pack Can Coolies Drink Coolers Black The best birthday gift is a funny birthday gift. Celebrate with a funny 21st birthday gift! Holds 12 oz cans or 12-16 oz bottles. Folds flat for easy storage. Machine washable. Premium 1/8" thick high density open cell polyurethane foam keeps beverages cool. You have chosen a 2 pack - keep one as a backup or share it with a friend. Coolies make a great gift or party favor. Also available in 6 and 12 pack for greater value.