Here are dyed vintage baby cup shells. They measure under 1/4" across.
These are available in various size packs and prices.
Listed from left: Top
White-pink-cream mix- 40+ per pack - $1.65
Pink-red mix -40+ per pack - $2.25
Dark Brown - 35+ per pack - $1.35
Lime Green - 40+ per pack - $1.35
Dark Turquoise -50+ per pack - $2.25
Mixed Blue - 30+ per pack - $1.35
These are from probably from the 1940-1960 era. These are getting very hard to find.