I have always wanted to try these, and I finally got a chance, They are sticky when it comes to them staying together. I thought that was kind of cool, because I can stack them without them falling over. It keeps them flat, so that takes up less room. These really do come in handy for me. They are easy to wash with the material, so when I’m missing a lid for my Tupperware I can use them as a replacement. Otherwise I can use it on my bowls and stuff that don't come with a lid, so it all works out together.