Aluminum foil - which side is used for what?

How to use aluminum foil? Which side of aluminum foil holds heat? Which side of aluminum foil is used for baking?

[@hashimsalim2665]

good ideas

[@patricialong2717]

According to Reynolds corp., it doesn’t matter what side of the foil you use! When in doubt, go to the source!!

[@SophieBird07]

Nonsense.