Bubble

Bubbles are animated background furniture blocks bought from the Party Girl after the world enters Hardmode. They can be attached to furniture, background walls, and blocks. Once placed, attached items can be removed, leaving a free-standing bubble. When Bubbles are placed together in groups, they connect to make a seemingly single larger bubble block. The only blocks that can be attached to placed Bubbles are other Bubbles (unless there is a background wall present).

Bubbles can keep liquids in them. Clicking on an empty Bubble with a full Bucket will place the Bucket's contents into the Bubble (the liquid can be removed again with an empty Bucket). Removing the filled Bubble with a pickaxe will free the liquid, causing the liquid to fall (Lava will destroy the Bubble). A player walking past a liquid-filled bubble will be subjected to any debuffs that would occur through contact with that liquid. This makes Bubbles perfect for honey buff pickups for arenas. Care should be taken with lava traps (for flying enemies), as the lava will kill critters as well. Water will give players the "wet" buff when mounting Cute Fishron.

Mechanics
Bubble block is a very special block. To players, NPCs and items, it is taken as air; to liquids and other tiles, it is taken as solid blocks. So you can use perma-solid blocks and bubble blocks together to contain liquids.

History
Bulle