Foaming biodegradable bioplastics may solve these conflicting outcomes of widely used plastic foams. Several biodegradable bioplastics, such as cellulose diacetate (CDA) , have been shown to biodegrade in natural environments (soil, freshwater, and seawater) on timescales of months to years . The degradation of plastics in the environment is a surface-driven process that depends on the surface area-to-volume ratio (SA/V) of the item and the specific surface degradation rate of the material (𝑘 𝑑 ) . The latter is a material property that quantifies the rate of surface erosion of a material in a given environment. The dependence on geometry suggests foams may degrade appreciably faster than their solid counterpart because of increased surface area .