Food storage bags generally have a layer of reflective mylar film on the inside, which is highly impermeable to gases and helps keep the food fresh. The outer layer is a polymer like poly(ethylene), which is more puncture-resistant than mylar.
Aluminum foil some bubble gum wrappers The inside of a potato chip bag
To reflect radiation back, where from it is coming. So hot contains will remain hot and cold will remain cold.
Shiny is Adjective.
Shiny
Photons
Argon is inside Crisp packets
nitrogen is a unreactive gass. It keeps the food inside the packets fresh
lithium
snow is shiny because the ice inside it is shiny
Lysosomes
tunneling
Plastic, with a very fine (one or two microns thick) coating of aluminum, to keep out the light.
Of course yes with a little of creativity you can recycle almost everything we have. Since it is Christmas time you can make your potato chip bag into a shiny wrapping paper or perhaps a shiny ribbon for your gift.
Yes, when you break open a geode, the minerals on the inside have a shiny appearance, some moreso than others depending on their composition.
Its a programmable chip inside of the key .
Maybe
Lysosome