Body: Stainless steel; Opening: PP; Cap: Polypropylene Product size (W x D x H): 2.4 x 2.4 x 5.1 inches (6 x After 6 hours of boiling water at 95 degrees Celsius or above 63 degrees Celsius/4 degrees Celsius cold water under 10 degrees Celsius Fluorine coating on the inner surface that does not retain color or odor Easy to clean, "disassembles and "fully washable" The "resin drinking mouth" is a gentle mouth; Wide mouth type that is easy to drink (approx. 1.2 inches (3 cm))