Material- Stainless Steel, Insulation Type: Double Wall, Feature: Pour Spout Opens Easily and Leak Proof- Our leak proof lid is designed with air-tight construction, always locks in the correct place. Even with a slight tilt will not leak one single drip., Making One Handed Pouring Simple, Non Leaching And Toxin Free For Healthy Drinking , Best Usage For Office, Travelling, Hospital, Gym, Home, Care Instruction: Use Mild Soap for cleaning the Flask and advised to be kept open when not in use to avoid odor, Ideal For: Pre-condition bottle with hot water if using for hot beverage and cold water if using for cold beverage, Capacity- 8 Hours