In the United Kingdom, the National Health Service (NHS) recommends consuming 6–8 glasses of fluids a day, or 1.9 liters (almost 65 fl oz), including water in food, water, milk, low sugar or ...

Powder. Most manufacturers use the same recipe: 1 level scoop of powder for every 2 fluid ounces of water. Add powder to pre-measured water, and shake it vigorously. You can mix up one bottle at a ...