Yeti was acquired years ago by Coleman or some other large company. Their specs were probably best in class for coolers and were aimed at sportsmen for hunting or fishing. The travel mugs were probably mostly for merch sales to promote the brand but definitely work well. FWIU, they lease those patents out to other manufacturers now, so some thermoses (?) are going to be basically the same product. What are yetis like $10-$20 anyway?