I couldn't agree more that you should not clean up after your brother, whether it's beer cans or vomit. He should clean up his own messes and your mom should tell him so. If she wants to enable him by cleaning up his messes, although she shouldn't, that's on her.

I don't know if your brother's drinking is a reoccurring event or not or how old he is. Hopefully, it's teenage experimentation and he'll get through it like most, but the scenario you described is all too familiar and I sincerely hope it doesn't turn into a lifelong struggle.