We bought several Calphalon One non-stick pots and pans a few+ years ago. Last year our 8 qt stock pot had the non-stick coating start coming off and it appeared that the aluminum underneath was bubbling up from corrosion, even in places where the coating was intact. Calphalon replaced it but the non-stick Calphalon One was discontinued so they sent us a hard anodized version. In less than a year, the anodizing is pretty much gone on the bottom and starting to come off the sizes. The bottom is rough and that causes stuff to stick and burn. We don't have any problems with the other pots. other than some scratches here and there.
Mostly we use this pot for stuff like chili, large batches of spaghetti sauce, and boiling noodles. Sounds like the chili and spaghetti sauce are the culprits in this failure according to Calphalon. They "shouldn't" have cause the first failure on the non-stick. And I also make smaller single-meal batches of spaghetti sauce in one of our smaller pots without trouble. They don't say you shouldn't use the anodized pans for that and they are going to cover it under warranty. They don't make Calphalon One anymore so they gave me three choices for replacement.
First is another hard anodized pot from the commercial series but it is 2qt smaller. The smaller size would be a problem and she agreed we'd probably have the same problem given our use.
Second is an 8qt non-stick from their Unison line with the "latest technology."
Third is an 8qt from their Tri-Ply Stainless line.
Any recommendations?