I am a bit skeptical that Facebook comments regarding this are actually read. So I am copying the one I made three days ago here:

Drill holes around the periphery that the silicone can ooze through so that there is a mechanical connection rather than adhesive. You can flatten the ooze to make it neater/more resistant to pulling out.

Yes. Here's a guide: https://www.facebook.com/SoChoklat/videos/1132903850118884/

If you're doing that, you might also like to pour some on a diffraction grating.

1. Buy callets (e.g., https://www.chocosphere.com/default/catalogsearch/result/index/?manufacturer=131&q=callets ). These may be at the high end of what you're looking for, but you can choose a sweetness and the shape seems like what you seek.
2. Buy a mold, buy bulk chocolate that you like, melt and temper it. Possibly you could also make little, mouth-sized puddles of tempered chocolate instead of using a mold.