Keeping your cookies soft

A few years ago I found this tip. you know how you make cookies that are soft and chewy? Then you put them in a container and they get harder. I have a tupperware cake size 9x11 inch with a sealed lid on it. I layer my cookies I make in it and when I notice they start getting a little harder I put a slice of bread at each end of the cookies, Just lay it on top and your cookies will stay soft. when the bread dries out in a couple days and there are cookies left I swap out the bread to keep my cookies soft and moist. thought this might be help since we are all making cookies over the holidays. happy mylotting everyone!