Designed to be the same size as a large cup of tea, this mug finds itself used everywhere from the arctic to a golf course. It's watertight, so it can be put into a pack or rucksack. Perfect for taking on your next adventure. 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 and safety Capacity: 300ml Dimensions: 65 x 65 x 160 mm Weight: 300g