Jacoba jug
These sorts of jugs were called ‘Jacoba jugs’ because as early as the 17th century they were found in the moat of the hunting lodge of Teylingen, where the 15th-century Countess of Holland, Jacoba van Beieren, spent her final years. According to legend, she made the jugs herself to fight boredom. Although thus long thought to have originated in the Netherlands, such stoneware was actually made in Siegburg in Germany.