If you use the cups in microwave, please keep it less than 120? temperature Made from Eco-friendly material - Natural Wheat Straw; You can see the scraps of wheat straw scatter on the surface No heavy metal, food-safe grade and dishwasher, microwave, fridge and freezer safe. Ergonomic thumb groove on the handle designed to provide comfortable grip and anti-slip. Unique heat insulatio material,no heavy metal, no poison,more environmental and safe,durable and shatterproof It can be healthy eating plate for your kids to have juice,water, milk and so on. Natural environmental protection,bring you the enjoyment of health and smooth handle! Material: natural wheat straw, BPA free. Size: Diameter:8cm, Height:12.8cm Color: Blue, Green, Beige, Pink Temperature resistance: -20? to 120? Made in China Package: 4pcs set 1 x Blue Cup 1 x Green Cup 1 x Pink Cup 1 x Beige Cup