A new type of alternative styrofoam is available that will biodegrade without leaching microplastics into the environment.

DS Smith's "fish boxes" are essentially moisture-resistant cardboard boxes that can be used in lieu of Styrofoam storage containers. Another product is a spin on soft drink packaging rings.

Their first product, a packaging material made from mycelium and agricultural waste, is a lot like Styrofoam ... "In addition to using less water, the process occurs much faster.