I added a waste_basket point and tagged amenity=sharps since I found this wiki page: https://wiki.openstreetmap.org/wiki/Tag:waste%3Dsharps

My concern here is that the value seems to have very little usage (109 on nodes), which makes me suspect there is a better tag combo out there. But I couldn't find anything that made more sense to use.

Keeping this note open since I requested a review on this.