A great little outfit created by Joe Berg and Charles Miller that was very popular in the early days of the Princess Magic Shop in Chicago. It can be adapted to many effects, and includes three as released.
I had a few issues with the cork and it does take some practice to be quiet, but it probably needs a different size cork to the one supplied (which is likely not the original, given that this effect is almost 100 years old). But I think if you find the correct cork and spend an afternoon playing with it this could be a real winner and you’ll have something the other guy does not.
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