When it comes to iced tea, one consideration trumps all others: Can you picture yourself drinking it poolside? With endless ready-to-drink iced teas flooding the shelves, Real Simple searched for the ones that scream “Summer!” in the three most popular categories, as identified by the Tea Association of the U.S.A., an industry group. Tasters judged more than 30 nationally available teas by sugar content, astringency level, overall taste, and aftertaste.