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Question:

What keeps things colder- plastic wrap or aluminum foil?

What keeps things colder- plastic wrap or aluminum foil?

Answer:

Aluminum foil. It is thicker, and metal retains heat/cold longer than the thin film of plastic would. I actually use both when I freeze things like lasagna...I use a layer of plastic wrap on it first, then a layer of foil over the top. It creates an extra (albeit fine) layer of insulation.

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