If the containers are the same apart from the colour, no. But if the red container is more insulated than the blue one, yes If the blue is more insulated than the red, no.
Igloo-type cooler.
Foam container will keep it hotter. The air bubbles in the foam act as an insulator.
the answer is it gets it colder
A Flask
No, at a certain temperature the water evaporates and turns into gas.
styrofoam, but warning fammable and unsafe for the environment!
no
thermos cup
In general, foam is a better insulator than metal, and so foam would be expected to keep water hotter longer under most normal circumstances.
Keep them in the refrigerator but not in water, just in a sealed container.
forever. given its in a sealed container
transfer heat to oil or water and keep it in insulated container