First of all, the off-gassing from this piece is horrendous. I had to sit this out in the sun for a week for me to tolerate the smell. Still slight smell a few weeks later, but tolerable. Be warned that the styrofoam packing crumbles super easily and makes a big mess, so you may have tiny stray static balls for a few weeks. And in case you haven't read the other comments - the corrugation is only on 3 sides, so this won't work if you plan to "float" this piece. And a crack on my lid developed after only a week (of not using it). Keeping these because it is the right dimensions and don't want to bother with returning such a big piece.