duplication of existing gear?
A prepackaged cleaning solution is great. I just want to point out that the two major ingredients in the cleaning tablets are Sodium Bicarbonate and Chlorine Dioxide, something you may already be carrying in your pack in other forms.
For the weight conscious hiker, baking soda, often used as a toothpaste substitute, also goes by it's chemical compound name, Sodium Bicarbonate.
For those purifying their water with Aquamira tablets or solution, you are using a branded chemical compound, chlorine dioxide. Just as Arm and Hammer brands sodium bicarbonate, so to McNett Aquamira brands chlorine dioxide.
A brief rinse with these two chemicals would presumably accomplish the same feat. I have had great luck just rinsing with baking soda.