Lid specifically designed to work with seven sizes of the Dart TamperGuard Snack Boxes (sold separately). TamperAlert Tab protrudes upwards when torn, alerting the customer that the container has been opened. "Do Not Purchase if Tab is Torn" message and "Lift" embossing, 360 VanishingEdge Seal that creates tamper resistance as well as a leak resistant seal. Food Container Type: Lid; Material(s): PET - Polyethylene Terephthalate; Material Type: Plastic; Color(s): Clear.