I just found out that "Dumpster" is a brand!*
Genericizing trademarks seems to be a specifically American habit. I wonder why. It's not like they put it up to the vote, so why would one country do a thing like that and others not?
* Bart: "Otto-man, you're living in a dumpster?"
Otto: "I wish. Dumpster brand trash bins are top of the line. This is just a Trash-Co waste disposal unit."