This is the best dental floss I’ve found. Materials are natural and biodegradable and it comes in a refillable glass jar. No plastic here of any kind. There are two types. Flosspot is made from silk worm silk floss with a coating of candelilia wax for a smooth glide between teeth. Flosspot Gold is silk made from corn husks, coated with candelilia wax, and a ginger-mint flavoring. Both are certified by the USDA as biobased products.