Extra Loading Capacity!
Borrow a dollar bill, and its initialed by a spectator.
The bill is folded, secured with a rubber band and placed inside the folds of a hank, held by a spectator.
Display a small brass tube with threaded lid & a brass bar running thru it.
The spectator to holds the Tube in their free hand. You vanish the bill from the hank, its now empty!
Ask the spectator to unscrew the brass tube, the missing bill inside!
Lock & Key included!