Osmosis by Rodrigo Romano

Conditions are extreme: you give someone the rubber band to examine and you ask for a ring from someone in the audience. The spectator grabs the rubber band and the ring (both clearly appear to be separated) and then the spectator closes his or her hand. When the spectator opens the hand, the ring is now interlaced with the rubber band. Everything happens in the spectator's hand! And there's more. The ring can separate from the rubber band many times. It is extremely visual. 

How is it possible? By Osmosis 

Remember: 

1. You hand out the rubber band for examination 
2. The ring belongs to someone in the audience 
3. It is not an optical effect 
4. And also... the rubber band can be given away!