Up until a few he Pyrex brand consumer food storage containers seemed to be this other glass (soda lime?, with the bluegreen if you looking into the edge).
Then, a few years ago, they seemed to switch essentially the same SKUs to a third glass (whitish looking into the edge) in slightly different glass forms, and slightly different lid fit). (I don't think they were counterfeit.)
Then, a few years ago, they seemed to switch essentially the same SKUs to a third glass (whitish looking into the edge) in slightly different glass forms, and slightly different lid fit). (I don't think they were counterfeit.)