I'm having the same issue. I ordered two boxes, but couldn't even finish one shake. The taste was exactly as you described it, and the smell was just as bad. I've had the RTD Strawberry before and it was really good..I think that this might be a bad batch, or it was left out in the heat for too long, and some of the chemicals from the plastic bottle got into the shake.
tgrfn787 wrote:I purchased two cases of the RTD shakes. The taste is quite horrible. It literally reminded me of vomit... sweet and then harshly acidic or bitter. I do not believe they are spoiled. Would not buy again.