Gluggle jugs are fish-shaped water jugs, and so named for the delightful glug, glug, glug sound that it makes when you pour.
Gluggle jugs were first made in England in the 1870s and became increasingly popular after they were given as a gift to Queen Elizabeth and Prince Philip in 1958. When filled with liquid, air is trapped in the fish's tail. As that liquid is poured out again, the air is gradually released and produces the famous gurgling sound.
At one point in time they were popular advertising pieces for Plymouth Gin.
They can be used as water jugs, wine carafes, or simply a whimsical way to display flowers or utensils.
And are always a conversation starter, around the table.
You can see it in action here : https://youtu.be/hmb42OnDW1w