I don’t know about vitamin water, but too much of anything can’t be good for you.
Yes, you can drink too much but I don’t think your two bottles a day will do any harm. Vitamins are just like any other type of “medications” over use or not following directions can indeed lead to overdosing on them and the results CAN kill.
2 bottles isn’t considered too much.. too much water can make you bloat, because your body is made up of so much water already…