I don't know about the coolers, they're just too expensive, but I do have one of the Yeti coffee cups. They're unreal. I drink iced coffee before work sometimes. Last week when it got up to 93 here in Vermont I left it in my cup holder in my car for about 4 hours. When I got in my car to leave work it was about 97 degrees in my car, but amazingly there was still ice in the cup!