This blown and molded square-shaped jar has a wide neck and flared lip. The white baked enamel shield is framed by stylized blue leaves with yellow and red flowers. Above the shield is a yellow crown. The bottle’s label bears the alchemical symbol for Powder, the word CREM, and the alchemical symbol for Tartar. This jar would have held powdered cream of tartar (potassium bitartrate) and is a byproduct of the winemaking process, crystallizing from the must (juice, skin, and pulp of grapes) in the fermenting barrel. Tartar was used as a diuretic and as a cathartic.