Product review (3 stars): NOT made in the USA
These water filters are NOT made in the USA. The product packaging clearly states that they are made for Whirlpool by 3M in Mexico. Close but no dice. Maybe the older version was made here in the states, but not anymore. This should be corrected in the product description as there are many of us that actually care about where something that filters our water is made. Minus 1 star.

Secondly, these are not packaged by Whirlpool and sealed in a way that they could not be tampered with. Everything else you buy these days is hermetically sealed in plastic so that you have to cut them with scissors to get them open - so why not these? Especially in the case of a product like this where you have to trust that what you're getting is genuinely New, and your family's health may count on it, I believe this is a substandard form or product packaging. Minus 1 star.

I was generally pleased with the previous version - only time will tell if the changes made to the product/packaging/manufacturing will affect water quality, taste or performance...