metal cup because it has insulation
Plastic is the better insulator. So in a warm room, the plastic cup will prevent cold water from warming up as quickly as water in a metal cup. Provided its not one of those thermos mugs.
Plastic - Foil is metallic and conducts heat easier
paper
Apparantely plastic keeps ice water colder because since aluminum water bottles absorbs the cold and the plastic doesnt so pretty much it keeps colder :)
styrofoam, but warning fammable and unsafe for the environment!
The snow would have to be heated to become water, then boiled to become a gas. This gas would then collect on a cooler material (glass, plastic, metal, etc) and condense.
Igloo-type cooler.
I think its a plastic.
cars don't have plastic radiators, if they do the plastic would probably melt, and the compound of metal cools and heats quickly which is useful in cooling water.
Metal shower heads look nicer but show hard water, plastic will not show hard water, if you have a water softener a metal shower head is the way to go.
probably metal
When you put metal in water it cools down quick. When you put plastic in the microwave, you're in for a big problem....Plastic is the answer.
aluminum foil