Custom thermo tumblers: the new evolution. The world is evolving rapidly and our office desk is also changing. Twenty years ago, an office worker's desk was characterized by papers, a pen holder and a coffee mug; today, a laptop, tablet and a thermo tumbler that keeps drinks at temperature are all the rage. As a metter of fact, custom thermo tumblers are one of the most popular gift. Let's find out what it is and how to use it.