Bag of Holding

This bag has an interior space considerably larger
than its outside dimensions, roughly 2 feet in
diameter at the mouth and 4 feet deep. The bag
can hold up to 500 pounds, not exceeding a
volume of 64 cubic feet. The bag weighs 7,5kg, regardless of its contents. Retrieving an item from
the bag requires an action.
If overloaded... kaboom. Do not put in other
extra-dimensional space, or else...