Used bullet casings may be among the last things we think of when we hear the word "recycle," but it's the first in the mind of Bullet Designs founder Karan Kirkham. When she first started the company on Ebay, her re-purposed products (bullet casings as pens, cuff links, key chains and more) sold faster than she could have imagined. Today, the business thrives on making some of the most novel and badass gifts on the market.