Bag of Holding
This item appears to be a simple sack of brown canvas.
Wondrous Item 1,000 gp
This bag can hold up to 200 pounds in weight or 20 cubic feet in volume, but it always weighs only 1 pound.
Drawing an item from the bag is a minor action.
Published in Player's Handbook, page(s) 253, Dungeon Master's Kit, page(s) 269.