Keeping your drink cold: it’s a necessity. Unless you’re drinking coffee or hot chocolate, then it’s the exact opposite of what I said. Besides, there’s already a coffee mug warp pipe for your hot beverage needs.
I remember back in the day I always had a Koozie to hold my Dr. Pepper because lukewarm soda suck. Most of the Koozies that I had growing up were foam affairs that my dad always confiscated for his beer.
Keeping your beer chilled is an age old problem. Sure, indoors, we have the fridge, and outdoors we have coolers, but coolers are bulky and awkward. You can’t carry an ice box along with you wherever you go.
Beer is a real man’s drink. That’s why it comes in a can or a glass. It would come in a suit of armor if it were practical to manufacture it that way. But since it’s not, Dougfungus has done it for us.
You gotta love those koozies that keep your beer (or whatever your beverage of choice is) insulated while you eat, watch TV, or do whatever it is you do while you gulp down your drink. If you’re feeling especially macho, then you need a koozie that reflects just that.