I'm betting most people have some empty Pringles cans in their home. They're hard to recycle because they're made of layers of carboard and metal and plastic. But you can use them to make a useful birdfeeder, and increase the biodiversity in your garden.
bird feeders

Recycled Bird Feeder
(via bean-sprouts.blogspot.com)
Submitted by Chickpea on Mon, 2008-01-07 21:27. | Tags: architecture | biodiversity | bird feeders | birds | recycled | recycling