Purple Up in your eye! Gah, I grabbed the bottle to dose the smaller tank, took one shake of it and got whitewashed in the face. I caught a big drop in my eye. After a lot of obscenities and cursing of the absent better half, who used it last, I'm glad to say I only have a bloodshot eye. I'm glad she wears contact lenses because I bogarted half of her saline solution ;D Make sure the cap is tight before shaking! Lesson learned.