This item functions exactly like a portable hole, except it unfolds into a square sheet rather than a circular one. The opening is also much smaller, only 1 inch in diameter. The inside, however, is the same size as an ordinary portable hole. 

Curse. This item is cursed, a fact that is revealed only when an Identify spell is cast on the item or you use it. Opening the item curses you until you are targeted by the Remove Curse spell or similar magic; closing the hole fails to end the curse and you will be compelled to re-open it. While cursed, you have the uncontrollable urge to find items and place them inside the hole, even if they do not seem to fit. You will not be able to stop until either the hole is filled or the curse is removed. 

Notes: Utility, Container