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. In dire need of a warm cup of tea on your adventures? Chuck this Thermal Mug by Lifeventure in your pack and you can enjoy a piping hot drink wherever you are. A thermally induced vacuum ensures that drinks hold their temperature for up to 6 hours and you won't have to worry about any leaks either as it comes equipped with a secure, screw-on lid.