I'm not really much of a collector, actually. I discovered the whole Frothingslosh thing from a play-by-mail game I was into back during high school and got back into in the mid 2000s, and I've collected a handful of cans just because I find the whole concept behind the beer to be amusing.
For the record, I encountered the name because one group of players in that game I mentioned was The Frothingslosh Syndicate, headed by Biff Frothingslosh, with others like Otto X Frothingslosh as well. I wasn't part of it back in HS, but when I came back to the game, a few of us resurrected it. We got Biff and Otto to come back, and some others were Sylvester, Guido, Ichabod, and Alfredo. We were basically the game's bad guys (it kept things more interesting that way).