A California-based company called Cove created a biodegradable water bottle, which, to my knowledge, is the first biodegradable bottle of its kind. The cove bottle is made from PHA, which is a group of natural biodegradable polyesters synthesized by microorganisms. Cove was launched last year, so it's currently available through invitation. It is a new sustainable product, so the price on the website is not shown yet, but from my research I'd guess around $3-$10. the Cove bo