How long does Cocofloss last? June 03, 2021 14:54 Updated Each Cocofloss spool is 33-yards. Flossing daily, using approximately 18" per day, Cocofloss will last two months. Related articles I have a tree nut allergy. Is Cocofloss safe to use? Does Cocofloss contain any PFAS? Is Cocofloss biodegradable? How do I insert Cocofloss refills? How long does Cocobrush last?