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 hoursStainless steel construction with vacuum-insulated wallsExpansion chamber with pressure release valve in lidConforms to British Standards for quality and safetyCapacity: 300mlDimensions: 65 x 65 x 160 mmWeight: 300g