I have to try to keep this small box as cold as I canI can use Aluminum Foil, 1 clear plastic sheet, Any colored construction paper, 1 sheet of tinted plastic, and newspaper.
Consider wrapping the box in aluminum foil to reflect the coldnessThen wrap the whole thing in construction paperHowever, ur box still wouldn't be very coldIf I were you, I would dunk the box in liquid nitrogen.
