Fuddling cups. These cups are a puzzle and are interlinked in a special way. They need to be drunk in a certain order or they will spill.
While I find many pictures of these cups, there are no schematics into exactly how they are linked. Puzzle jugs have schematics, but I have not found more information on how fuddling cups are joined. I also would like to see one of these in action! there I would love to replicate these.
if anyone has any info that would be great!
http://recedingrules.blogspot.com/2010/02/puzzle-jugs-fuddling-cups.html?m=1