styrofoam, OTOH, uses Chlorinated Flouro Carbons in production and containers with CFC are on my "avoid" list. I prefer to support food
establishments that package thier products in paper , aluminum foil
or other non-plastic containers.

BTW, have you heard of the experiment that has been done with a
styrofoam cup in a submarine? apparantly when exposed to pressures
such as found at great depths, the cup will shrink to the size of a thimble, as the "bubbles" of foam wil be compressed. It seems some
musician (Michael Hedges?) received such a cup which had a message
written on it and was taken "down below" and the writing had to be
read with a magnifying glass!!