We have always used Aquatabs. Find them a little expensive but we have always used the water for hot drinks only, and never noticed any taste. I looked online, and I wasn't convinced that all those items advertised were actual Aquatabs so I avoided buying. Norwich Camping stock them. Not sure how the prices compare. I wasn't sure about the Milton as I guessed that items were rinsed after being in Milton, but being a mere man, what do I know? Perhaps rinsing negates the Milton cleansing?