Acrylic Countertop Display Case Tower. The Rectangular Countertop Display Case has 2 stationary shelves that are removable. The 2 shelf countertop display case tower is locking and has a single door. Keep your merchandise safe behind lock and key with this acrylic display case tower, while featuring it on your countertop. This acrylic countertop display case is also called a countertop showcase tower with 2 shelves.