I agree that they rotate who manufactures their products. I don't think it is that easy with liquor, especially considering there aren't any other TBB labels for either whiskey other than those linked above which would be required if they switched distillers.They will often times rotate who makes their Kirkland products, based on who gives them the best price. I will agree that it is always of good quality; Costco isn't going to put their name on something below par.