Bag of Insufficient Volume

This bag has an interior space just barely smaller than any object anyone tries to put in. It appears roughly 2 feet in diameter at the mouth and 4 feet deep. The bag weighs 15 pounds, regardless of its lack of contents.

Placing a bag of insufficient volume inside an extradimensional space created by a handy haversack, portable hole, or similar item instantly destroys both items and opens a gate to the Astral Plane. The gate originates where the one item was placed inside the other. Any creature within 10 feet of the gate is sucked through it to a random location on the Astral Plane. The gate then closes. The gate is one-way only and can't be reopened.