If you’re a coffee lover, you’ve probably got a cabinet full of mugs—more than you could ever actually use. Instead of ...

Old coffee and tea mugs cluttering up your kitchen? Here's an easy crafting idea to put them to work - and it won't take long at all.

This provides fodder for fun jabs and inside jokes, but it did get me wondering: Why do coffee and tea stain all my mugs, and why are the stains so hard to get rid of? With these questions in mind ...