hyperhydrating. She was drinking almost that much before she was given the water bottle. Someone much larger than normal that exercises lots probably should drink that much water, but most people about 2 liters is good. Hyperhydration appears to run in my family. My son was also told by his dr. to cut back on his water. I've kept a water bottle on my desk for many years. Drink the water room temperature. Drink and fill as I feel thirsty. No fixed amount or goal volume.