Lifeventure thermal mug 300ml description feel at home on the hill with a hot cup of tea you can chuck one of our legendary and colourful mugs in your rucksack and it wont leak or break a thermally induced vacuum keeps drinks hot or cold for up to four hours travel tip the thermal mug is equally good at keeping cold drinks cold features keeps drinks hot for up to 4 hours or cool for 12 hours stainless steel construction sleek watertight design conforms to british quality