A brilliant, highly versatile product from Life Venture that will keep a hot drink hot (or a cold one cold) for up to 4 hours. Designed to be the same size as a large cup of tea, this product finds itself used everywhere from the arctic to the golf course, and it's also great for high mountains where temperatures drop quickly. Completely watertight, it can be kept in your rucksack until needed it will keeps drinks hot for up to 4 hours or cool for 12 hours. Features: Stainless steel construction with vacuum insulated walls  Expansion chamber with pressure release valve in lid  Conforms to British Standards for quality and safety  Capacity: 300ml  Dimensions: 65 x 65 x 160 mm  Weight: 300g  Find More Lifeventure Thermal Mug