Mini Retainer Box - White, Plastic with Hinged Lid, 3"W x 2-1/2"L x 5/8"H, Package of 12 Boxes. With hinged lid snaps. Heavy-gauge plastic construction. The Mini Retainer Box is a colorful storage solution designed for retainers and mouth guards. Made with heavy-gauge plastic, the protective container is guaranteed durable and lightweight.It is waterproof and features a hinged lid snap that securely stays locked. Each pack includes 12 retainer boxes measuring 3 x 2-1/2 x 5/8 inches deep, available in different colors.