it's boxes are absolutely perfect carefree they pass from the freezer to the fridge through the dishwasher and the microwave. No denoted distortion or the box or cover. They pile up without problems and are pretty nice. big blue keep very, well washed salad wrung several days! I am really delighted with this purchase so I contacted the seller to buy more only intended for a person dishes for the freezer (roses) a thousand times alas alas seller sells only this lot sizes boxes different !! it's really unfortunate for him and unfortunate for me ...