For soundproofing and recording studio needs, you can find fire-rated and high-density acoustic panels at major home improvement and specialty audio stores. : Carries high-density, fireproof panels like the KIWDZFU 2-Pack for roughly $126 . Target : Stocks affordable options such as the VEVOR 4-Pack for around $36 .
(Class A fire-rated) for about depending on thickness. Where to Buy Egg Crate Mattress Toppers where to buy egg carton foam
: Offers unprinted styrofoam cartons in various colors like green and aqua. Prices range from approximately $15 for small sample packs to $43 for a 50-pack. For soundproofing and recording studio needs, you can
: Features a wide selection of colored styrofoam cartons (pink, yellow, blue) for $60 - $70 per bulk set. They offer free shipping on foam cartons. (Class A fire-rated) for about depending on thickness
If you are looking for actual foam containers for holding eggs, specialized farm supply stores offer the best variety.