This borosilicate glass jug is also known as a “glug jug” or “gluggle jug” in English. It originated in England, where it was first produced in the 19th century, and later became especially popular from the 1950s onwards. The most famous version is the one made by the British company Dartmouth Pottery, which produced these jugs for decades.
A fun fact: during a 1958 visit by Queen Elizabeth II to the Britannia Naval College, it was a gluggle jug that was used to serve water to the royals — contributing to the object’s fame.
How the “glo glo” works
The famous “glug glug” or “glo glo” sound is produced when liquid is poured: as the water flows out, air enters the hollow cavity of the fish, creating a gurgling effect, similar to the sound of wine being poured quickly from a bottle — but more exaggerated and amusing. This effect is what has charmed so many people over the years.