Product review (1 stars): Product does not have NSF certification
I purchased a set of 3 water filters (the one to the right) with blue lid to replace the current real one in the right with white lid. When i was ready to replace it today, i opended one of the (Amazon) filters for replacement and foud the the inside does not look very clean. The opening was also not the same size (see pucture).
I choose not to use  these Amazin filter because there was noNSF certification on them. This make me feel that the product looked like a counterfit product. I ended up buying the exact one i had before from a local store.