I purchased this zero water pitcher over year ago. Within three weeks the amount of money that I used to spend on bottled water was recouped on the cost of this product.  I only need to replace the filter about every five months. Granted I’m the only one using the water and I would imagine the more people you have drinking water the more often you would have to replace the filter. But in the long run you’re going to save tons of money and getting much better water!