Bio-glass countertops are another eco-friendly kitchen material worth exploring. Each upcycled glass slab typically consists of up to 100 percent recycled glass from beer, wine, and sparkling water bottles sourced from recycling centers. Bio-glass countertops are usually available in cools shades of blue or green and more often than not, do not include colorants or additives. While bio-glass stands up to heat and resists stains, it dings and chips more easily than countertops made of glass and cement.