Features:- Material: Stainless steel construction with vacuum insulated walls
- Sleek, watertight design
- Keep drinks hot for up to 4 hours
- Keep drinks cool for 12 hours
- Expansion chamber
- Pressure release valve in lid
This is an excellent way to carry your drinks wherever you go! Keep it hot or keep it cool. Take it to the beach, park, on the train to work or up a mountain! The 'Lifeventure Thermal Mug' Conforms to British Standards for quality and safety.