I like china markers for many things instead of a sharpie.
The grease pencil, a wax writing tool also known as a wax pencil, china marker or chinagraph pencil (especially in the United Kingdom), is a writing implement made of hardened colored wax and is useful for marking on hard, glossy non-porous surfaces.
https://en.wikipedia.org/wiki/Grease_pencil
I use them for plant labels, packages and quite a lot in the kitchen. The wax is a little hard to remove from glass or metal...not impossible though and I suspect it might stain plastic?
I tried to find out what's in them and all I found was 'non toxic wax'. I assume they are
petroleum based, like crayons are? Something in their make up lets them adhere better than a wax crayon does.
