Oh I know it's plastic, I'm not blind! Someone had mentioned being able to see fermentation, ie using a clear fermenter, and most are glass, so that's why I jumped to glass. I figure if I'm using plastic, it's going to be buckets as they're crazy easy to use all around. Except prying the lids off, which I had a lid removal tool for.
It is odd that the starsan foam would be up where it is, yeah, but I don't know how it could be anything else.