In a grande, it ranges from 25 mg to 95 mg, depending on the iced tea. All herbals teas have 0 mg of caffeine.
Iced coffee has 165 mg of caffeine in a grande.
All the iced tea used to get added sweetener but not anymore, as of March 2021.
Now, you need to add a syrup to sweeten.
Iced tea lattes come sweetened though.