One company that is doing a lot in the portable filtered water bottle industry is Katadyn. Katadyn has been creating filtration systems for awhile now, but the filters they are selling, including the one shown here,
Another option could be Innova Water Filters. They sell both screw on filters to any standard water bottle, which in our mind, defeats some of the purpose because the consumer would be getting fresher water but the health risks are still there. Innova also sells water bottles, but after trying to search for one of them, the best place I could find to buy a normal water bottle would be waterfilters.net and I'm pretty sure everday consumers do not check that website.
There are a few other competitors out there that are just like the previous two. Pres2Pure markets towards hikers when they sell their canteen like water filter and Sport Berkely has a straw as well.
Our goal would not be to create a state of the art filtration system, it would be to market this water filter to the appropriate person. The general public does not understand the potential detrimental health effects that both bottled water and tap water have. By marketing to the appropriate people, and selling the bottles in the appropriate stores, Filtra could go above and beyond what the competition has done in the past.