Overall, this is a great idea. The bottle has heavier-duty plastic that should last a long time. According to hiker friends, the seals on the Clean Bottle work well; no drips were found on a recent journey. However, there are some drawbacks: the bottle holds only 22 ounces vs 24 for the modern Trek & Specialized bottles. Additionally, the plastic is stiffer which makes it more difficult to get a strong swig of fluid, though the stronger material should last longer.
The Clean Bottle seems like it would be a hit with Mommies with young kids (in fact-Dave, maybe think of making a smaller sized one for infants and young kids), hikers, and cyclists who actually think about their bottle hygiene.
Bottom line: well done innovating on something that most folks have taken for granted.
4.5 (wish it had larger capacity and softer plastic)