undersorter
Undersorters don't like going to the trouble of sorting things into categories. When they pin things, (on Pinterest), they just put it all up on one page. If an image link directs you to the Pinterest page of an undersorter, you will likely scroll all day before locating the original source for that image.
Too bad the only Google image for this thingy takes me to this undersorters Pinterest page. Now I'll never find where to buy it!