It is very well that you think about plastic and want to be eco friendly as I understand. I totally agree with. I have been using different filters for 5 years and I have started from simple dispensers on taps, but as you know, they don't provide the ideal filtration. That's why I also decided to install a big filter system in my basement. I understand that it tooks a lot of space, but is more convenient than to change these ugly filters on taps every month. I have bought my device at water filters San Diego. It is the most reliable service which I have seen. I always have opportunities to write them in support or to ask repair for guarantee