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Goblets are one of the most used instruments ever. 3 balls each pass In turn through stacked goblets and defy the laws of logic with impunity! https://www.youtube.com/watch?v=60_aOYXOKNo
Cups are one of the most used instruments since time immemorial.
3 balls each pass In turn through stacked cups and defy the laws of logic with impunity!
