A brilliant, highly versatile product that will keep a hot drink hot 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 golf course. Watertight, so can be put into a pack or rucksack. Features Keeps drinks hot for up to 4 hours or cool for 12 hours Stainless steel construction with vacuum insulated walls Expansion chamber with pressure release valve in lid Conforms to British Standards for quality & safety Capacity: 300ml Dimensions: 65 x 65 x 160 mm Weight: 300g