How to make sweet tea; like the kind at Mc Dondles.?

I'm craving some tea right now. The sweet tea from McDondles. I was thinking I could maybe make it but I'm not sure if I already have everthing I need. I have a big jug of "Arizona Southern Style Real Brewed Sweet Tea" but is that all I need or am I suppose to add something to it. I don't want to try it plain to see if it taste like McDondles Sweet tea because the McDondles Sweet Tea is the only tea I like. Every other tea makes me sick!