If you’ve ever studied marketing, you probably learned about product line extensions. That’s when the name of an already successful product is used to market a new item in the same category. Think Coke, Diet Coke, Cherry Coke, Coke Zero, etc. In the world of As Seen on TV products, a good example would be Snuggie, Designer Snuggie, Snuggie for Kids and Snuggie for Dogs. Product line extensions are a good way to extend the limited lifespan of As Seen on TV brands.