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 :)
aluminium foil. that's easy
A wet towel will keep drinks cooler. This happens because the sun or whatever heat source will try to dry the water from the towel. This requires heat energy, and is drawn from the towel resulting in a colder temperature in the towel itself.
Aluminum containers are generally considered more sustainable and environmentally friendly than plastic because they are more easily recyclable and have a longer lifespan. Additionally, aluminum containers are less likely to leach harmful chemicals into the water compared to plastic containers.
alot
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.
Plastic - Foil is metallic and conducts heat easier
The rate at which water freezes depends on the thermal conductivity of the container. Plastic is generally not very thermally conductive, whereas aluminum foil is more thermally conductive. Thus, as long as the foil is not very much thinner than the plastic, the water will freeze faster in the foil.
It could be water condensation from a warmer interior forming as water droplets on the colder plastic wrap.
Aluminum cans are more valuable than plastic bottles.
A plastic tray will float in water because the plastic material is less dense than water, causing it to displace an amount of water greater than its own weight. This buoyant force keeps the tray afloat on the water's surface.
plastic is an insulator so it keeps you from being electrocuted.