p.p.p..p.....PANDA FILM!! It's the bomb. Cheap, thick, lightproof, washable, re-useable, and reflects light on one side! You could build a lightproof yurt in the middle of the Gobi desert with that stuff, in case you wanted to feed your pet yak cannabis like the Swiss have been known to do with their cows. Now we know why the cheese is so good.