Save your money or test with paper and foil baking cups
I think probably the foil/paper muffin cups popularity came from
sending muffins to school with the kiddies. Their grubby little hands
were handling the muffins and it aided in frosting them, too. I don't
know if I'd want to eat them if someone had been handling my 'naked'
muffins with their bare hands while doing a frosting job.
No proof, just an opinion.