Made of stainless steel and plastic lid. Capacity: 0.41 liters. BPA free. Its leak-proof sealing technology with hermetic screw and its double wall with intermediate vacuum allow the temperature of both cold and hot liquids to be preserved for a long period of time (approximately 12 hours). Removable lid for easy cleaning. This reusable cup is perfect for replacing disposable plastic bottles, also helping to improve the environment.