In the latter half of the 19th century, stein makers found different advantages within the different materials. The advantage in using stoneware to make steins was that molds could be used to mass-produce elaborately carved steins. In using glass, not only could one produce multiple glass mugs, but an artistic touch could add to the glass by including acid etchings, glass staining, or even multicolored overlays. Porcelain's advantage was that a stein fabricator could use molds to make "character steins", steins that had a particular shape modeled after an item or a person.