With filtered water, fill a tall glass bottle (800 ml), 80 percent full.  Fill to the top with unsweetened, not from concentrate, 100 percent cranberry juice.  You may make it weaker by diluting a little if it is too strong at first. 

Take the recommended supplements with your CranFlush and with your fruit and sip throughout the day until you have consumed 3 bottles equaling 81 oz.