I love coffee. The other night without thinking, I made decaf in a cup that had a bit of Sugar Plum Spice Holiday Herb Tea remaining in it.
Holy Maloney! It tasted wonderful. It may have something to do with all the spices in the tea, which include cinnamon, ginger, cardamom, natural plum, rosehips and hibiscus. Just a possibility.
So tonight I made a cup of the tea and put three teaspoons into a cup of coffee. Same effect.
Not sure what a teabag would do to a coffee urn. The tea is from Celestial Seasonings.