I have never had an open beer get warm, except over in England where they serve it warm. I do use koozies, mainly because they are easier to grip and I don't risk dropping a precious beer. I collect koozies from about every bar I go to that has them.
I also collect Alabama National Championship koozies but I am running out of room for them. I may have to get a separate cabinet just to keep them in.
When we started selling Yeti coolers at work somebody said they needed one of them to keep their beer in. I told them that if they needed a cooler that would keep their beer cold for a week they were doing something wrong.
