aluminium foil keeps food colder because it doesn't let air in.
aluminum foil
aluminum foil
aluminum foil
Apparantely plastic keeps ice water colder because since aluminum water bottles absorbs the cold and the plastic doesnt so pretty much it keeps colder :)
aluminunm foil
It would definitely have to be plastic wrap because plastic wrap is an insulator, which aluminum is not.
aluminum foil keeps things colder.
aluminum
aluminium foil. that's easy
aluminum foil is better at blocking temperature from getting out than plastic wrap. the atoms in the element aluminum are bigger and have more neutrons/electrons and protons than the elements in plastic wrap.
Glass keeps beer colder due to its molecular structure.
Me personally I would say that plastic wrap keeps things colder because it keeps things better contained than aluminum foil. See aluminum foil rips easily than plastic wrap. So I would say plastic wrap.