Snap Jar

A Snap Jar is a container enchanted with a magical trap. When it is first created, its intended owner, or owners, must drip a drop of their blood inside of it. If anybody other than the owner tries to stick their hand inside, the opening of the container will snap shut, often cutting of the intruder's hand. Most Snap Jars also have additional enchantments that prevent the contents from being spilled out and strengthen the material it is made from so it cannot be easily broken.
== Variants ==
Some Snap Jars, such as the Snap Chest, slam their lids closed when activated while for others, such as the Snap Pouch or Snap Pot, the opening seals itself. If the lid of the first variant has been removed, it will teleport back to its closed position, severing whatever is in its way.