Food grade stainless steel with internal and external polished, no BPA and inodorous, rustless and durable. Prevent scratch and drop-proof. Used over and over again with a good substitute for glass and paper cups. Stacked up together and save your space, convenient for you to storage and carry around. Used as coffee cup, tea cup, espresso cup, wine cup, beer cup, beverage cup and more. Suitable for both indoor and outdoor activities, such as birthday parties, home gathering, traveling and camping. 16oz.