A green accounting method called “mass balance” certifies that something was manufactured with recycled plastic — just not necessarily much of the bottle making the claim. Sustainable Living, Plastic Bottles, Labeling and Labels (Product), Advertising and Marketing, Containers and Packaging, Consumer Protection, Eastman Chemical Company, Nalgene A green accounting method called “mass balance” certifies that something was manufactured with recycled plastic — just not necessarily much of the bottle making the claim. NYT > Business