What are your favorite plugs made out of?

I can’t wear metal because I have metal allergies. So my favorites would be wood or stone. I have a crystal set, blood stone set, but my amethyst ones would def be my favorite.

My favorites are my koa wood set.

I love the natural light weight feeling of wooden tunnels

My favorite are either silicone or acrylic or glass ?

Any kind of natural stone amethyst & quartz is much all time favorite