The Jar

The Jar is an activated item.

Effects

 * Isaac can store up to 4 extra Red Hearts in The Jar if there are no remaining empty Heart Containers.
 * When used, all Red Hearts in the jar are dropped on the floor, rather than directly consuming them.

Synergies

 * /: Spawn double the hearts put into the jar, allowing for infinite health to be spawned.

Interactions

 * Broken Remote: Allows for teleportation with no recharge; however, it drops the contained red hearts in the room it was used.
 * : The Jar acts as usual, and doesn't double the hearts dropped upon activation.
 * : The player cannot pick up extra hearts while The Jar is in the inactive slot.
 * : Storing a heart in the jar does not stop the bleeding effect, despite playing the "heart collected" sound effect.
 * : Consumes stored hearts to spawn heart wisps, rather than releasing heart pickups. Heart Wisps have a chance to drop a half red heart when destroyed.

Trivia

 * The Jar is a reference to the Empty Bottles of The Legend of Zelda, which The Binding of Isaac takes heavy inspiration from. In Zelda, empty bottles are recurring items that are used to store a variety of items; this includes life-restoring items such as potions or fairies, which The Jar mirrors by allowing the storage of red hearts.