Product review (4 stars): Why not subscribe and save?
Bought this to put in my fridge, and it was easy to install and works great. No problems there, however, since this is an item that you should change every six months, I think it would be helpful if this could be a Subscribe and Save item. I'd sign up so I wouldn't have to write the date on it and enter it into my calendar. First world problems, yes, but it would be helpful.