Cloud in a Bottle

The Cloud in a Bottle is an accessory that the player can equip, allowing them to double jump. The second jump is shorter than the first jump, but has practical uses such as using it at the last second to prevent fall damage. It is currently found in Chests underground and in dungeons.
 * There is a bug as of 1.0.2 that prevents the second jump of the Cloud In A Bottle from negating fall damage Patch Notes for 1.0.2.

Here's a Demonstration of Cloud in a Bottle.