I will admit up front that this gadget is well-nigh useless in sunny all year SoCal. But that said, do you really need a rooftop magnetized beer holder to chill your beer?
Even in chillier climes, you could really only use a few months of the year. And then, only, if you don’t buy from a cooler (which you should), or buy in advance. Is there a market for forgetful winter people and if so, I think you need to be more organized and not just fill your life with gear to enable your lack of planning.
I do like the name, Blitzen and I think that if attached correctly, you won’t get beer/wine missiles hurtling through freeway air but this is NOT NEEDED>