Great idea, bad design. The design flaws make this completely useless and its not worth printing. I'll outline my issues with the design below and will be working on a functional version of this idea.
The hook on the beer holder which connects to the belt attachment is completely round. This makes the beer holder rotate freely so there's nothing stopping your beer from falling out which happens quite often. This is made worse by how the hook is positioned around the middle of the beer holder so that its top heavy when you put a almost full can inside of it, making it almost impossible not to fall out.
The hook is also not the same shape as the hole it slides into, making it awkward to attach.
the belt attachment is flimsy due to being designed too thin which means it cant be fixed by print settings. It's difficult and tedious to remove supports on the belt attachment since its so flimsy and the supports get hidden within the slots, it should have been oriented upside down to avoid this and save material since a significant amount of the belt attachment is just unnecessary supports.