I bought what I thought was the containers I've been buying all along (that come in 2cp and 1qt size) with blue screw-on lids--made by ZIPLOCK.

But when I'd washed them and went to put a lid (from the cabinet) on one--it didn't fit--THEN I saw--these were Glad brand and not as thick or sturdy (it seemed to me) as the Ziplock but at the same price.

SO watch it or your sets won't fit interchangably (?) is that a word?? LOL!