I've got some of these, not a full set, but mine have fruit decorations-pear,strawberry,orange,etc. Got them with an original holder which was a pierced red cardboard semi-circle on a flat base- very Deco looking.
I suppose they are for holding garnishes like olives, fruit slices, etc, in place in a cocktail glass.
They are cute,delicate little things, & it's amazing they've survived down the years!
There were many similar items made as beads- I have beads in the same style shaped like fruit, animals, figurines,etc.
I always thought they were Czechoslovakian, but as to what maker, I never knew- this thread is proving very interesting!