Birds of a Sweater. Filled with organic catnip and made from recycled or upcycled materials, this eco-friendly cat toy is great for the environment and your cat at the same time. The sweater material is made from upcycled wool sweaters and the beaks are made from recycled water bottles. (FYI to our Cool Pet Products readers, "upcycling" is when you take a waste material and converting it into a more useful product.) We think these handmade cat toys are absolutely adorable and your cat would look very cute playing with them. And on top of that, they're earth friendly! $12 for 3. BUY.