1. Keeps hot for 5 hours or cold for 9 hours 2.unbreakable Plastic interior and exterior 4. Accept customer's printing 3.16oz plastic 12oz heat transfer mug Both of the inner and outer layers are made of Food grade plastic, great for coffee, tea or beverage use. Features: Constructed with double wall Plastic, this 12 ounce coffee tumbler is virtually unbreakable, yet its fashion design is both ...