There are sizes of bottled water that range from 8 ounces per bottle to 2.5 gallons per fridge pack. You can also buy purified water in 5-gallon jugs to use in office and warehouse coolers.
Most personal water bottles are either 16.9 ounces, which is equal to 0.5 litres, or 1 litre. The idea behind these standard sizes is to make measurements the same all over the world. Because Americans like ounces, some U.S. companies still sell traditional 20-ounce, 32-ounce, and 64-ounce bottles of water. Anything over 1 to 1.5 litres usually goes back to being measured in fluid ounces.
