If your favorite mug or cup is showing signs of your coffee obsession, these simple tricks will make it look like new.

In my family, we have an ongoing joke because my sister absolutely will not touch a mug with even the faintest coffee stain, no matter how clean it is. That got me thinking: Why do coffee and tea ...

Your view of coffee mug stains -- like that other famous glassware optimism metric -- is also a litmus test for your view on ...