Question: Remove coffee and tea stains from inside of cups.
Option 0: Sometimes scrubbing tea cups and mugs doesn't remove all the stains. Take a bit of baking soda on a damp cloth and apply to the outside of the cup. Rub gently, and the stains will disappear very quickly.
Option 1: Sometimes scrubbing tea cups and mugs doesn't remove all the stains. Take a bit of baking soda on a damp cloth and apply to the insides of the cup. Rub gently, and the stains will disappear very quickly.
Answer: 1