NSF conducted a test of Aquamantra's "Biodegradable" PET bottle, using ASTM D5511. After 60 days, the bottle achieved an overall biodegradation total of 4.47% or 10% of the positive control. Moreover, the biodegradation process has stopped, as the gas generation curve has plateaued. Per ASTM D5511-11, the results of this test cannot be extrapolated to claim that the bottle will fully biodedgrade in the future.
You can download the entire NSF report from the link below: Aquamantra NSF PET D5511 Test Results J-00091962 Final Report.pdf