Suitable for cold food. Not suitable for use in a microwave or oven. Not recommended for long-term refrigeration. Made from bamboo paper with PE both inside and outside coated. This PE Coated bamboo paper is food grade, creating a water-resistant layer that helps to keep food fresh. Perfect for cold food, such as cold drinks,milkshake,yoghurt, wine, smoothies, thick shakes, slushies. 720ML.