Yes, they do !! Normal tea and normal coffee. 3/4 teaspoon coffee, 1 & 1/4 teaspoons sugar and give the teabag a good dunking then add a bit of milk. It's nice.

I love it. Brew some normal orange pekoe tea, then sweeten(no milk). Then add a bit of coffee to the cup, to desired taste. Then put in a large glass over ice. It is similar to ice tea, but with a faint flavor of coffee, which makes it somewhat smoother. I figured this out TODAY actually, i accidentally got decaf tea (oh no!) so i put some coffee in it to give it a kick. I will still put it in normal tea too, it will just make it stronger! We all need that boost..

Not to me. I've accidentally poured espresso into a cup with my morning herbal tea in it. It tasted quite awful. I suppose it would depend on what kind of coffee and tea you mixed, but it doesn't appeal to me.