The filter does not work constantly. It fills with air and cannot filter the water. It must be squeezed to release the air.
A filter does not last more than a month and a half. Compared with the same use of other filters and its value is more than double.
The consistency of your water purifier with your quality tester in just one month the meter fluctuates from 002 like new to 006.
I think the optical illusion of seeing 002 compared to tap water 237 is impressive and comparing it to water in Nestle plastic bottles 026 that are more purified. But Zero's filter would have to maintain consistency for a longer period of time in the same circumstances as Pure for example or Nestle for its price to be RASONABLE and not exaggerated and excessive.
At the end of the process of introducing a new and better product, the amount of sales at a lower purchase cost prevails over the competition.