After seeing a news segment on the "dangers" of sun tea (one of my favorite things), where the biologist they spoke with recommended "refrigerator tea" instead, I decided to try it (bachelor style). I took a couple of regular everyday Lipton's teabags and stuffed them into my favorite bottled water. The only trick is to feed in some extra string (since they float at first). Then I put the cap back on over the strings and put it in the fridge for 12-24hrs.
Pulling them back out is tougher than putting them in, but the trick is to only use the string until you can grab the teabag itself.
Delicious tea, and zero bitterness. And no dishes