W5YI : Your Resource for Ham Radio and Commercial Radio Licensing. Our Primary Mission is offering products and services to assist individuals in obtaining FCC Ham Radio and Commercial Radio Operator Licenses. The W5YI Organization consists of three separate business operations: W5YI Group, W5YI-VEC and National Radio Examiners.
Hyperhydration would cause you to have an imbalanced electrolyte level and could potentially be fatal. With a gallon of milk, it is much safer because the average person cannot digest the amount of lactose in a gallon of milk in one hour, which their body would cause them to purge it without harm. Source(s): http://en.wikipedia.org/wiki/Hypervitaminosis_D.
Presuming you're awake for approximately 16 hours per day, you'll have to drink between 4.65 and 6.25 fluid ounces per hour. That may seem like a lot, but it isn't much more than four to eight sips per hour (depending on how much you take in). If you always have water with you and have an easy method of refilling (e.g. sink, water cooler, etc.) you won't have too much trouble.