Visual Coin Penetration by Johnson Precision Magic

We wish you could all see this one live. It never fails to sell itself
on this effect alone. Two clear drinking glasses, a playing card and
two Half Dollars are all individually shown. Card is placed on the
mouth of one glass and the second glass is set on the card. The two
Halves are dropped into upper glass. Yes, the spectators actually see
the two coins enter the glass. When they hit the bottom, one coin melts
away, penetrating through the bottom of the glass and the card. It is
seen and heard as it drops into the lower glass. One coin is dumped
from each glass onto the table. You're as clean at the end as you were
at the beginning. This is truly the most visual piece of magic we have
come across yet. There is no possible explanation for it. Includes two
coins, card, and instructions.