Place an item in the bag. Instantly turn the bag inside out to show that the item has vanished! The item can be made to reappear if desired. Also can be used to exchange one item for another. Show the bag empty, put a blue silk into it. Reach in- the blue silk has now become a red one! Great for doing a Blendo routine, Mismade Flag, etc.
 
Several Change Bags are available from MagicTricks.com. This one operates by a lever on the handle, and has a bag compartment open at the top only.