I don't have a Costco membership, but my daughter just got one. So I had a chance to go to Costco for the first time in many, many years. I wanted to see if they had more/better keto options than BJ's - which is where we currently have a membership. Costco does have more keto friendly items - including AVACADO MAYO and clarified butter. I bought some of the mayo. It is a little different, but it is good. It's a little runnier than Duke's or Hellman's, which I had pretty much stopped consuming due to the seed oil content. So I'm eating mayo again. The clarified butter, on the other hand... meh! Maybe good for cooking, but I'll stick to regular butter for the flavor.