Cold barley tea really is just about the perfect thing for scorching hot weather if you can’t be drinking mint juleps, and better for you. Like pu-erh, barley tea is supposed to help cleanse the organs.
This particular variety has a much more roasty/toasty sweetness than the varieties I’ve purchased in large, Asian import grocery stores here in the USA.
Just steep an entire pitcher of it for at least half an hour in tepid water, then move to the fridge. No need for ice if you keep the whole thing cold.