Product review (4 stars): DO NOT THROW AWAY THE OLD FILTER--YOU NEED THE SCREW BASE.
DOn't Throw away your old FILTER!!! You have to have the screw base from the old filter to use on the new ones or they won't work. These filters work great. But I totally get why some folks get frustrated about them not coming with a screw base. They do really need to call that out on their packaging Because on the picture on the packaging it totally shows that base on there. So it implies your getting one with it. Which you are not. The picture of the actual filters themselves is exactly what you get. Don't look at the box its misleading for sure.
But the product does work fantastically with no issues. If the confusion with the base wasn't a part of the equation. I would give 5 stars.

So Remedies you really need to fix your packging or really call out the base issue for the filter. But that does need to be addressed.