Hi these are certainly glass umbrella cocktail picks or sticks, these ones are most likely Czech, If you still have them or find any more I would be interested. Novelty Silver umbrellas start 1931, paper umbrellas about the same time. Glass novelty cocktail picks (as opposed to swizzles and stirrers) have defiinetly been made from 1936, Often attributed as Murano & Bimini, most are German or Czech.
Regards
Dominic