Several years ago I worked at a nursing home where the kitchen staff made iced tea by the same method as sun tea but the jar was placed in the refrigerator the night before and by noon the next day the tea was made and ice cold. It was a very pure taste. Nowadays I heat the water containing a tea bag in the microwave, fill a large cup with ice and then pour the microwaved "concentrate" over the ice. Works for the immediate consumption and for just myself.