In the Kids Milk Costume you’ll have all the calcium you need this Halloween. Moo-ve over boring Halloween costumes, this milk carton costume is cute and funny. Pair up with a friend and go as milk and cookies this Halloween. Or maybe try a milk and cow group costume? This costume includes a milk carton tunic. One size fits most. Availability: The Kids Milk Costume takes approximately 1 business day to leave the warehouse.