Turkey Hill Green Tea tastes different and not in a good way

I love green tea, Lipton and Arizona are usually my go to, but today I decided to give Turkey Hill a try to taste something a bit different, but when I started to drink it at first it tastes okay enough but then there was this dirty aftertaste that I have a hard time describing but it's not pleasant. Is there something wrong with the jug I bought or is this what real green tea is supposed to taste like. I think I'll go back to Lipton till then.