Why is it two drops in treatment bottles and in a glass of water — surely the person taking the glass of water will get more remedy?
This is true, but the amount of remedy is not important as long as the minimum dose is taken, and the minimum dose is the amount you get if you take four drops from a treatment bottle. When putting the remedies in a glass of water you are taking more than you need, but by putting in two drops you can be sure that even if one drop sticks to the side of the glass you will have enough remedy in the water for it to be effective. It also means that you can sip from a glass of water without worrying about how big the glass is or how much water is in it (see below) or how much of the water you have drunk, because even a few sips from the largest glassful will give you the minimum dose.
