No more sticky, smelly spills from containers that don?t stay shut. The Set of 4 Green Mini Locktop Containers are designed to create a leak-proof, airtight seal simply by pushing down of the green outer frame of the lid. The durable BPA-free containers resist warping and staining and are dishwasher and microwave safe. The base and the center of the lid are clear so you can easily see what is stored in each container. The containers are stackable for more convenient storage.