Engineering360: "Cellulose Microbeads Reduce Plastic Waste in Rivers and Oceans"

Biodegradability of consumer product materials in contact with food or beverage is a tricky adventure in technology. Such issues as exotic preservatives embedded in the material for preservation during the object's service life, but responsive to biodegradation at the onset of the intentional waste elimination process, is the first big hurdle that comes to mind. Also, all manner of stuff can be adsorbed on preservative stabilized cellulose, such stuff, in turn, becoming support for offensive organic (e. g., mold) activity.

But this is a start. Some products need to be put into the real world to advance the concept.