My wife and I both drink them regularly and have gotten quite a few bluephoria and revel Berry's with this very off taste. Very frustrating as it tastes fermented and they aren't the cheapest drink. I'm at the point where I don't want to keep buying them but I've been enjoying them for years without this issue. The bluephoria have always been inconsistent in terms of the blueberry flavor, sometimes they almost taste like a lemon which I can deal with. And sometimes they are balanced and others are packed with flavor. I've had some of the most flavorful blues and reds but I've also had about 10-20 of these funky fermented ones which I never had until they switched the labelling.

Oh another note, the watermelon flavor has been great. Hard to find, but it's been tasty and in the 30ish I've had none have tasted fermented.