I am inquiring about model SB (Sports Bottle).

I am inquiring about model SB (Sports Bottle). I have seen your SB item advertised elsewhere on the Internet and was interested in purchasing it.
So in researching the product on your website, I was confused by the description. What do you mean about this model NOT being a "Doulton Product"?

What we mean by NOT being a "Doulton product" is that our filters are based upon physical proprieties of pure diatomation earth (ceramics) which is, submicron filtration in absolute range whilst the sport bottle rely on carbon and ion exchange media to adsorb (like a magnet) certain contaminants from water. Sports bottles are manufactured in the USA. Doulton ceramics - in UK.