#keep drinks cold

A friend of mine is gone for hours at a time in remote areas of North Texas and Southern Oklahoma as he sells cattle ranches and farms.  Some of these ranch properties are remote from even basic convenience stores, so he has to bring food and drinks with him.  For his drinks that he prefers to maintain a certain temperature, such as keeping coffee hot while driving, I am going to recommend to him that he gets the Bulletproof MiiR Travel Tumbler due to its ability to keep drinks at the right temperature at 16 ounces, rather than other products which can keep the same temperature - except with less volume for the same price.