The bubble maker is a machine that the Mermaid Princesses use to create bubbles in the bath. It first appeared in Episode 1 called The Pearl Tear and it is used in many episodes with different mermaids. It is mostly used by Lucia and Meru once.
The machine is a blue, teapot shaped machine with a pink jewel bottom and a jewel on the top as well. When the user turns the handle clockwise, it creates bubbles automatically.
There was an actual toy based on the bubble maker that was released in 2003 by TAKARA. It is an extremely rare collectable that lots of fans want.