Thermal Mug blue in colour is a brilliant, highly versatile mug which will keep your drink hot for up to 4 hours. This mug is very useful & can be used in many places such as holiday, artic, golf course or mountains. The mug is watertight so it can be put into your rucksack & it will not leak. The thermal mug can also be used for cold drinks & this will keep your liquid cool for up to 12 hours. Comes with an expansion chamber with pressure release value in the lid. Capacity 300ml. Dimensions: 65x 65x 160mm & weighs 300g.