Our airtight seal is activated by the lid’s switch. When the switch is open, air flows freely, making it easy to remove the lid, fill or empty the jar, and then reseal it. Pressing down the switch locks the lid in place, creating an airtight seal that helps protect food from exposure to air, moisture, and contaminants. While the seal keeps air from entering or escaping, it is not a vacuum seal—it won’t remove existing air from inside the jar. However, it still helps prevent spoilage, staleness, and degradation by limiting exposure to air and humidity. This design ensures a simple, effective storage solution for keeping pantry items fresh.