Made with high quality 100% lead free crystaline material, Food safe, BPA Free, Passed FDA lab test.Double Wall glass works like a thermo cup, keeps hot drinks hot and cold drinks cold. For coffee drinker, hot coffee always taste superior than cold.Care Instruction: Hand Wash only.Double Wall Small 250ml Tumbler with handle, Set of 2.Keep hot drink hot and cold drink cold, Perfect for coffee. Microwave Safe.