Vacuum insulated stainless steel bottles like one from Hydro Flask [see related link "hydro flask" below] or Thermos [see related link "thermos" below] will keep them coldest.
Apparantely plastic keeps ice water colder because since aluminum water bottles absorbs the cold and the plastic doesnt so pretty much it keeps colder :)
aluminum foil keeps things colder.
aluminum
Glass keeps beer colder due to its molecular structure.
aluminum foil
aluminum foil
aluminum foil
aluminium foil keeps food colder because it doesn't let air in.
aluminunm foil
It would definitely have to be plastic wrap because plastic wrap is an insulator, which aluminum is not.
aluminium foil. that's easy
Glass because it is a poor conductor of heat. Aluminum is highly conductive, which means that when you pick it up the heat from your hand would move quickly through the aluminum and into your drink.