The firm says its new GoodFloss harps are both. What's more, they're designed to make flossing easier.

Late last year, Goodwell unveiled an open-source compostable toothbrushaimed at helping to bring down from 300 the number of non-eco-friendly plastic toothbrushes that each of us is estimated to put into landfill over the course of our lifetimes.

The firm points out that plastic one-time flossing harps are also contributing to our landfill sites. In order to tackle this problem, its GoodFloss harps are made using what it calls a "proprietary compostable blend of biodegradable material."

In addition to being eco-friendly, the GoodFloss harps are cleverly designed for convenience and use. The harps come joined together in groups of four that are about the size and shape of a credit card, making them simple to slip into your wallet for day-to-day use or when you go away.