Yes, liquid bleach from the store that is unscented is an excellent method to kill bacteria in water. It only takes 8 to 12 drops per gallon of water so you only need a small bottle with a "dropper" spout built in. I use an eye drop bottle like for "Visine" or other over-the-counter eye medication. Flush it with water and then dry it before filling with liquid bleach. You can also use the dry chlorine products from pool supply houses but the dosages are different - they are cheaper on a per use basis but for me they are less convenient.