These are absolutely the storage containers ever! I love how the lids lock right onto the containers. You can also fit containers inside of each other for easy storage. These come with 9 containers and 9 lock in lids. The containers are different sizes, some rectangle, some round. These are so simple to use and lock the lid in place. I don't have to worry about spills or anything. I love using my containers for cookies or other baking ingredients. You really can use these to put so many things in. I love them and have told my family about them, because I like them so much.