Versatility is bonus when it comes to magical apparatus.
To have a piece of equipment that can perform more than one function is a definite plus. 

A bag with a netting front is shown to be completely empty.
The magician simply turns the bag around, and when displayed once more it is seen to contain a silver or gold coin.

Another variation is to start with a coin in the bag, and have it multiply.

You can even make a coin vanish with this bag. It's an asset to any young magician's collection.

The video I've posted here gives a demonstration of one use of a very versatile item.

Watch here.