In the Adult Glass of Milk Costume you’ll be the perfect refreshment after a rich and tasty dessert. This milk costume includes a soft costume tunic that looks like a real glass of milk. Do you and your significant other go together like milk and cookies? Then get your sweetie in on the fun and add an Oreo Cookie costume for a cute and fun couples costume. One size fits most. Availability: The Adult Glass of Milk Costume takes approximately 1 business day to leave the warehouse.