Sometimes a warm drink is all you need to lift your spirits in the cold outdoors. The Lifeventure Thermal Mug has a stainless steel construction with vacuum insulated walls that keep hot drinks hot for up to four hours. Cold drinks also stay cool for up to 12 hours. It is designed to hold a large cup of tea and has a watertight construction to prevent leaks and spills.FeaturesKeeps drinks hot for up to 4 hours - or cool for 12 hoursStainless steel construction - with vacuum insulated wallsExpansion chamber - with pressure release valve in lidNo leaks or spills - Sleek, watertight design Conforms to British Standards for quality and safetyCapacity: 0.33L