I haven't gotten into the Yeti tumbler thing, but from what I understand, the RTIC performs just as well in tests. It keeps ice frozen for 24 hours and hot drinks hot for 6 hours. Amazon is running them as a deal of the day today, and they have a 4.5 star rating.

RTIC 30 oz. Tumbler on Amazon

For the price, these are a terrific deal!