You clearly love the mini filter (its very good), others love the Millbank bag, your and their minds won't be changed so there is really no need to keep banging on about the Sawyer.
Might be better to take a gander at the date of my posts before commenting, i posted that over 1 month ago in a thread specifically asking about the Millbank bag.
That fact that you've quoted me on a old post points to you "banging on" about it
It's also pointless comparing the Millbank bag to a Sawyer filter.
The sawyer filters out most things that would be harmful to us in the UK, the Millbank filters out nothing of the sort.
With regards to changing peoples minds, the op requested specific information on the Millbank bag regarding "No idea of their effectiveness?"
As it doesn't guarantee safe drinking water i simply posted a link to a product that does.