Classic antique door knobs can be given new life as one-of-a-kind wine-stoppers. These make great conversation pieces, and gifts for your friends. Each knob has its own character, knick, bumps and scrapes, from many years of use. All knobs have been salvaged from old homes, and most have come from local Habitat for Humanity ReStores, so the proceeds also help support Habitat's mission to provide affordable housing for those in need. The corks are 100% natual, food-grade, and from a renewable resource. This is the ultimate Green Product.