Control biofilm and bacteria in your water system, without using harsh chemicals. Specifically designed for use in independent water bottle systems. Odourless, colourless, tasteless, neutral pH solution. Simply squirt into water bottle – No measuring, no mess. Non foaming, no residue that may clog. Used with 700mL water bottle: lasts for 166 uses / Used with 2L water bottle:lasts for 56 uses.