It was 100 degrees in the sun yesterday with 70+% humidity, a good day for very little except swimming and making sun tea.
You need a big glass jar, 2 gallons or so. Plastic won’t work, the container has to be glass. I found one for $2 on clearance at Walmart.
I used mint regular and green tea, 4 bags for 5 cups of water. You put the tea bags and the water in the jar and let it sit in the sun for 3-5 hours.
Sun tea is mellow, and I much prefer it to brewed ice tea. It goes without saying that even mentioning it in the same sentence with powdered ice tea mixes, those convenience food disasters that taste like bitter sawdust, would be heretical.
The caveat is that because the water isn’t boiled, sun tea must be consumed quickly, within a day or so. In the Dog Days of August, though, this is not difficult to do.