Packaging: The most common biopolymers used in packaging are polyhydroxyalkanoate (PHA), polylactic acid (PLA), and starch. Starch and PLA are commercially available biodegradable making them a common choice for packaging. However, their barrier properties and thermal properties are not ideal. Hydrophilic polymers are not water resistant and allow water to get through the packaging which can affect the contents of the package. Polyglycolic acid (PGA) is a biopolymer that has great barrier characteristics and is now being used to correct the barrier obstacles from PLA and starch.