COPCO/WILTON-Minimus Tumbler. The Minimus is a reusable insulated tumbler for cold beverages. It is BPA-free and keeps drinks cold for up to 2 hours. It holds 24 ounces and features a screw-on lid and a flared straw. Each package contains one Minimus Tumbler. Available in a variety of designs (each sold separately). Hand wash only, do not microwave. Imported.