Lipton Unsweetened Ice Tea

So when I go out to restaurants and they serve Lipton ice tea that is unsweetened does it have any calories because I have gotten some very mixed up information. The stuff in the bottle does but some of their other unsweetened ice tea doesn’t? I really want to know so if anyone can help please do it is like the best ice tea but I won’t drink it if it has calories.

Tea has no calories...Nor does water...if it is unsweetened there are no calories from sugar. So 0 calories.

I drink the green tea equivalant ocasionally also 0 cals.