Those who are eco-minded have to take two main factors into consideration. Which floss is the most effective at cleaning their teeth and which is the most eco-friendly? Zero waste is an important lifestyle for many people. It helps protect the environment and reduces the amount of plastic choking landfills and oceans. When you're looking for an eco-friendly floss, there are three main types to consider: Bamboo, silk, and Corn PLA fiber. Here's a brief comparison of all three, so you can find the best natural floss for yourself.