I based my understanding on this wiki page: https://wiki.openstreetmap.org/wiki/Tag:amenity%3Drecycling#Recycling_type:
> `amenity=vending_machine` + `vending=bottle_return` for all machines that accept bottles, cans and crates which return.
and considered ambiguous tagging as undesired.

I see that I might be wrong here. Please consider joining discussion here: https://osmlatvija.zulipchat.com/#narrow/stream/358602-general/topic/depoz.C4.ABta.20punkti and help us get to a consensus.