Disappointing that an average documentary had to be produced by Hammond. You veered of around 22 min. You missed a few very important points. 1. Tap water scares are common. Also many people have died and caught disease from tap water,maybe more so in Victorian times though it is ingrained unconsciously. 2. Some waters from the Caucasus are known for there very high mineral content and are preferred from tap water due to its taste as well as its digestive properties perhaps if you talked about the theories on the properties in those waters. 3. Lastly the very high mineral content of waters in Northern Caucasus actually help with constipation. So although I'm not saying that these waters are any better, my point is there are reasons why people choose bottled water depending on various factors. These could of been explored a little more thoroughly. Plus many other various important factors in the for and against in tap and bottled water.
In Hammond's defence this came out circa 2004 and back then his fame was'nt as considereible then as it is now. Top Gear which was Hammond's big break was only 2 years old and not quite the sensation it was by the time he left the show.