I don't even like tea that much, but that is disgusting. All those flavored powders. That isn't tea; it's an abomination.
It quite literally has no tea in it. :O

As for me, in summer I make a giant pot of green tea and chill it, and drink it iced. I quit pop (aka soda) years ago, after a scorching bladder infection. (Sorry, I know, TMI.) Iced tea is my summer go-to drink. No milk, no sugar. It the southern United States it's all "sweet tea." Yuck.
Cold tea sounds like a sensible thing in summer. And funnily enough in Yorkshire fizzy drinks are known as 'pop'. :)