The interior of your favorite mug covered with dark brown sediment is a reality ... If you're dealing with tough tea stains ...

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 ...

Oolong tea, dark tea and red tea. Green tea is the oldest tea from China and has the highest production rate. Green tea is attained from tea leaves picked during spring. The tea is novel in that ...