Okiyo Joki Cork & Wheat Straw Double-Wall Tumbler – 350mldo your part in reducing single use packaging by handing your okiyo tumbler to your barista for preparing your coffee or other hot beverage. The double wall design and the comfortable, soft cork covering will insulate your hands from the hot liquid inside, while keeping your cupper warmer for longer. The cup is made from a blend of pp and wheat straw, which reduces the amount of plastic needed to produce this reusable tumbler. 13. 5 ( h ) cm pp, wheat