Why does styrofoam keep the heat in best at 50 degrees celsius!!!?

Question

I did an experiment and 50 degrees held the heat the best but i dont know why

Answer 1

There were other factors. Without knowing the details of each experiment, I can't tell.

but there is nothing magic about 50C and styrofoam. It works at any temperature about equally well as long as it doesn't melt or freeze.