Many types of boilie stoppers are available on the market. They come in various colors, sizes, and materials, such as silicone or hard plastic. There are also different models and shapes, such as artificial corn.
Making your Own, how and with What?
I’m going to explain that to you. Buy a broom (for example, at Action). They are now available in various colors.
With wire cutters, you can cut them into different lengths, and then use needle-nose pliers to give them the desired shape.

I always have a bunch of hard plastic broom bristles in my tackle box, so you’ll never run out.
Good luck!
Reviewed by Angling Escapes Editorial Team
Editorial Review & Fact-Checking