Alright, you guys know those cupholder-trays you get at fastfood restaurants when you go through the drive-thru? You know the ones that you could put four drinks in? Anyway, i know how to get a ton of those and i was wondering if that stuff would help at all in reducing the echoes and stuff in my room/studio? Or what about that coney foam you get at like fabric stores? I'm not sure is it density, shape, material etc. that matters? Let me know what you think.