Product review (4 stars): Leaked, but leaking stopped with "keg lube"
We have ordered the single pack in the past, but this time we went for the 3-pack to save some money over the long term. The packaging of each individual filter was different than the filters sold individually, but it looked legitimate. Our filter leaked a little bit at the rubber o-ring, which was a bit upsetting since we had three of them. I took the leaking filter out of the refrigerator and applied some food-grade lubricant (look for keg lube at your local beer brewing store or other food service store) to the o-ring. The lubricant definitely helped as we have not had any leaks now in over two weeks.