There are various reusable baking/parchment paper substitutes on the market now, and a quick trawl through Aliexpress reveals at least three kinds:
- Cloth, reinforced with fiberglass (very cheap, from $1)
- Silpat-style mixed silicone and fiberglass mats (from $4)
- "Pyramid/fat reducing" silicone mats with a textured surface (from $4)
Is there a meaningful difference between the cloth and the silicone types? The textured/pyramid ones obviously won't be much good for baking anything where you want a flat surface.