Bottled tea is billed as being healthful because it contains polyphenols, antioxidants that may help ward off a range of diseases, including cancer. But scientists say they’ve found that many of the popular bottled tea drinks contain fewer polyphenols than a single cup of home-brewed green or black tea. No, we’re not talking about the pure form of tea that is actually good for you.

A study actually found that you would have to drink 20 bottles of store-bought tea to get the same amount of antioxidants that are in just one home-brewed cup. Store-bought bottled teas not only are packed with sugar, but a lot of these drinks get their hue from caramel color instead of actual tea.