Also known as daddy's lil' treasure chamber.

You have trained your anal cavity to store huge objects or large quantities of items since kindergarten, where you used to smuggle cigarettes and candy. Criminals use this skill to smuggle stuff into prisons, such as: weed, a guitar, a rug, lamps, a disco ball, a drum set, and a small carillon. It is said, that one man once smuggled an entire combine harvester into Hungary using this technique.

Your internal organ now functions as an extradimensional storage space, with a volume of 64 cubic feet, or a maximum weight of 500 pounds. Storing or retrieving an item is uncomfortable, and can take a few minutes.

If you have the criminal background, you can take this feat for free at 1st level, if you want.

You can take this feat multiple times, each time increasing the volume by 64 cubic feet, and the maximum weight by 500 pounds.