This glass is a Theo Bamberg (Okito) creation. It allows you to perform many effects including routines with a bottomless glass. At the same time, you may have liquid inside the glass, all around the tube.
 

Includes 8 routines fully explained: Candle through the glass, The disappearing ring, Milk and Silk, The disappearing drinking straw, The appearing candle, Misers dream and more!