The magician shows an egg and vanishes it...

He then displays a clear glass which, if he chooses, he can hand out to be examined.

The audience having been satisfied that the glass is an ordinary one, the performer now shows a brown paper bag, which he says has some confetti in it.
He thrusts the glass into the bag and brings it out heaping full of confetti!!!
He levels off the top, dropping the excess confetti into the bag. During his subsequent patter, he scoops some confetti out of the glass and tosses it into the air. He then picks up a silk handkerchief and drapes it over the glass. After pronouncing the magic words, or other suitable hocus-pocus, he whips the handkerchief away from the glass, and slowly raises the glass into the air, revealing that the confetti has disappeared, the vanished egg having taken its place!

For the finish, the magician breaks the egg into a glass.