THE EFFECT

A card is selected, signed, returned, and lost in the deck. The card appears in a sealed bottle of clear soda. The card is poured into a cup, floats to the top, and the spectator unfolds it to reveal the signed selection!
 
Lightly used book, though you will have to seek out the refills.  They come up for sale occasionally on eBay, Etsy, etc   You can also get similiar ones on Amazon