Bests & Worsts Reviews from Amazon

I've used these for 3 years now. And each filter lasted at least 3-4 months. Zero Water is now selling a different version (If only I could get the straight ones like these).. they are tapered at the bottom. They last about 1 month. In addition, even overnight, the water does not filter through - I've had to hold the tank up and make sure there's no air bubbles caught in the filter. Big thumbs down - used to be a great product. Now I'm looking for the old type filters (the ones that look like these in the picture) and simultaneously alternatives for filtering water.