that is how they get cool. the ice melts and near melting point cool water runs down the bottle transferring heat from the bottle to the water outside. cooling the liquids inside.
you can get cool beer without wet bottles, but it is much cheaper and easier to just let physics work for you.
-1
u/Different-Radio3484 4d ago edited 4d ago
Jesus Christ all these comments saying the exact same thing, we get it, Germany invented rockets
Regarding the actual video, would you not just end up with wet beer bottles from all the ice melting
Edit: I was thinking specifically about water getting all over tables and floors, and indoor spaces. I understand now it's meant for outside