I drink a lot of tea, and instead of using powdered iced tea mix (NOT cheap or green), here's what I do:
I have a half gallon glass milk bottle (you could use a big jar or any type of glass bottle). I fill it with HOT tap water, pop in 3 tea bags, and set it on the counter for an hour or so to steep. I'm still nursing Ollie, so I stick to decaf or herbal teas, but you can try lots of different combinations. My favorites are: 2 decaf bags and 1 earl grey, or 1 decaf, 1 lemon, 1 mint.
I don't sweeten my tea, but if you wanted to you could add a squirt of agave nectar or honey.
Oh, and toss those used tea bags in your compost pile instead of the trash!