I have owned this pitcher and the bigger one for many years. I wont use any thing else. The water tester that comes with these products is not only for testing your zero water filters, but I use it to check other water sources, like my tap water-EEK-  and bottled water. I tested brita, Brita tested the same as my well water. Not to bad, but not zero either.  I use these products daily, I make coffee, tea, ice water, dogs water and for cooking. This products does what it claims.  Very pleased with ZERO.