Magician shows a tied box and asks spectator to keep it. 
He borrows a coin from a spectactor. 
He signs on the coin, so as the spectator. 
Take out a scarf. He covers the coin with the scarf. Put the coin into a transparent glass that filled with water.
Check the glass. The coin is gone! ! ! ! The audiences never know where the coin is.
The spectators check the tied box. 
There is a match box inside the box. 
Open the match box, the marked coin stays inside.

Whole product completes with one gimmick and one red handscarf and explanation video. 
The box and match box in the following demo are not included. 
They are regular boxes. You can get them from shops. 
We also explain the way how to make the coin go to box in the explanantion video.