Using values of 𝑘 𝑑 and the thickness of each straw (Table ), projected environmental lifetimes were 14.6±2.7 months for the CDA straw, 9.40.9 months and 9.80.9 months for the two PHA straws, Phade and Beyond Green, respectively, and 7.10.9 months and 9.11.3 months for the uncoated and coated paper straws, respectively. The PHA-based straw degraded approximately five times slower than the 58 days (1.9 months) advertised by the manufacturer. This variation in environmental lifetimes underscores the need for transparent reporting of experimental conditions used to test biodegradable plastic products.