He holds the matchbox with one hand and draws attention to a small hole in the center of the face of the box

In addition to that it's the only card with a back of a different color

Then show the cup empty

For over 20 years

the methods for these effects are cumbersome and often call for elaborate special props

Modern Flap Card (Bildseite zu roter Rückseite) | Hondo Hondo He holds the matchbox withThe Flap Card was first introduced in 1922, in Professor R. Kunard's Book of Card Tricks . In the decades since, it has become a staple in the routines of magicians worldwide, used to produce all sorts of stunning effects. However, limitations of the original 1922 design constrain these performances: magicians must precisely position their audience, keep constant pressure on the card surface, and perform tricks almost immediately after setup for best