Hi! I have an idea for a product that i want to invent / make. I know nothing about materials / science. I came across this website and thought I would post my question. I am looking for a material OR a combo of materials that can withstand the SUN (from the outside) - it will have a lot of exposure to the sun that has a cooling effect / can keep something cool on the inside (as much as possible) the material must be sustainable It should not be flimsy - it needs to carry something relatively small inside. It needs to be quite sturdy. Any ideas / things I could possibly look into further? thank you!