Place a crystal clear glass or bowl on the table.

A helper joins you on stage and you pour some of the water over their hands and into the bowl to show it is nothing but water.
With sleeves rolled up and both hands shown empty, you  reach into the water and pulls out  your hand in a closed fist.
You open it where an ICE CUBE APPEARS!
Show your hand empty, reach into the water and close yours hand & PRODUCE A SECOND ICE CUBE!!!

A third time reach in, this time producing a HANDFUL OF ICE CUBES/strong>!