Keep your fresh soft drinks cool and hot coffee warm on the go. Eco-friendly 550ml double walled reusable bamboo tumbler it is made from a blend of natural organic bamboo fiber and Polypropylene. Renewable and biodegradable. The use of disposable plastic cups is no longer recommended as it pollutes the environment. This cup is strong durable and anti-bacteria it is BPA and phthalate free. This product is dishwasher safe but microwave is not recommended.