can be made from colored ones, if you use bleach water to soak them then rinse them with a "hard" spray. stubborn paint can be rubbed off with a cotton swab after soaking.
i needed a couple of hundred one year for a project, and bought the colored ones of all sizes at yard sales, end of year clearances, etc. and then soaked them.
just don't do it in your bath tub. the paint will "flake" and float and stick to the tub, a bear to clean