What's the best travel mug? Whether you prefer iced coffee, hot coffee or hot tea, we've all struggled to finish our morning beverage before heading out the door -- or worse, risked a spill in the ...
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 ...