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. The only blocks that can be attached to placed Bubbles are other Bubbles (unless there is a background wall present). When Bubbles are placed together in groups, they connect to make a seemingly single larger bubble block.

Bubbles can keep liquids in them. The liquid cannot be seen inside the Bubble, so empty Bubbles and filled Bubbles appear the same. 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 through a liquid-filled bubble will be subjected to any buffs and debuffs that would occur through contact with that liquid.

Tips

 * Once placed, surrounding blocks and background walls can be removed, leaving a free-standing bubble.
 * Honey-filled Bubbles are 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.
 * Players can walk on Water-filled or Honey-filled Bubbles using any Water Walking Boots.
 * A column of Water-filled Bubbles is essentially a column of Water, and can be swum in when the player is equipped with an accessory that grants the ability to swim. Any accessory that works under Water can be used with Water-filled Bubbles (extending breathing time, granting the Merfolk Buff, or allowing flight).
 * In adventure-themed Terraria maps, bubbles can be used as a filter to any liquid, including lava (for any particular part of the map where you have to get away from an incoming lava stream).
 * The next two tips show how liquid stored in a Bubble can be affected by liquid that comes into contact with the Bubble:
 * If two adjacent (side-by-side) Bubbles are filled each with a different liquid, it is possible to craft contact-created blocks (Honey Block, Obsidian, or Crispy Honey Block). When the Bubble filled with the slower-moving liquid is removed with a pickaxe, a contact-created block will be crafted (consuming both liquids). For example, if one Bubble is filled with Honey, and an adjacent (to the left or right) Bubble with Water, and the Honey-filled Bubble is then removed with a pickaxe, a Honey Block will be crafted. Keep in mind that Honey moves slower than Lava, and Lava moves slower than Water.
 * If a Honey Bucket is poured over a Water-filled Bubble, a Honey Block will appear to the left of the Bubble, and the Water inside the Bubble will be consumed. Only a portion of the Honey is consumed, the remainder will fall to either side of the Bubble. In a similar manner, Crispy Honey Block will be formed if a Lava Bucket is poured over a Honey-filled Bubble, and Obsidian will be formed if a Lava Bucket is poured over a Water-filled Bubble. In each case, only the liquid inside the Bubble is fully consumed. Also, the slower-moving liquid must be poured over the filled Bubble... if a Water Bucket is poured over a Honey-filled Bubble, no block is created, and no liquid is consumed.