After years of experimentation, Nebraska green building experts Jen Carlson and Josh Shear have created a new fiber composite made using recycled denim. Dubbed Denimite, the material is manufactured from old, shredded-up blue jeans and “bio-based thermoset resin binder.” The duo have launched a Kickstarter campaign to raise funds for scaling up production of the fiber, which they envision being used for architectural projects and consumer designs. A mere $20 gets you not only one of these cute Denimite square rings, but also the good feelings that go along with helping get a progressive business off the ground. This would make a great gift for the loved one with an interest in design and sustainability. Order now and you'll have it by Christmas.