Struggle attaching the snap on lids with majority of the containers.  I have other similar containers which I love and have never had any issues.  I believe I have one container in the set where the lid snaps on fine, others I can get 2 of the 4 to snap.  It's frustrating taking time to line up lids just right only to find all the clips won't snap.  I should have returned them when I could have.  Perhaps I just got a defective batch.