The travel mug is of always vacuum flask company. The mug is designed to help those traveling and they can't miss out of their hot coffee, it keeps hot liquids hot and cold liquids cold for reasonable hours, the mug has a wide opening which helps for easy cleaning inside, it's made of stainless steel material inside and out and also with astrong handle for a proper grip. It can also be used in offices basically for those who start off with a busy day and little time for breakfast. This is the best you deserve.