From Donald Holmes in Kansas City about 90 years ago. Holmes produced and sold the best glass tricks of the day, often selling directly to other dealers. We listed (and sold) the classic Holmes mirror glass on this site. Click to enlarge photos.
This is the Holmes Confetti to Candy Glass, a method to load a glass apparently with confetti and, later, change the confetti into a candy or a small bird. Photos show the glass "full" of confetti and a top view of the heavily fluted glass and the fake confetti-covered metal insert containing the load. (Use your own shoe box of confetti at the beginning of the trick where the load is initially hidden.)
Great for kids shows.
Price is $52 plus shipping and insurance.