Scientists found that cellulose diacetate foam (CDA) is the fastest degrading bioplastic in an ocean environment. This new foam material is demonstrated to be a viable replacement for Styrofoam products and single-use plastics, like food packaging trays, as it achieves all the benefits of plastic but doesn't contribute to plastic pollution. This biodegradable bioplastic foam was evaluated in a flow-through seawater tank. After 36 weeks, the CDA foam lost 65-70% of its mass, and the degradation rate of the CDA foam was 15 times faster than solid CDA.