Made of PET, ClearPacSafeSeal containers are specifically designed to inhibit tampering, eliminating the need for shrink bands and wrap labels. TheTamperAlertHingeprotrudes outward when torn, alerting the customer that the container has been opened. The hinge remains attached to the container, for no loose plastic pieces. ClearPac SafeSeal containers function as an easy to re-close and re-open, leak resistant two-piece container once the hinge is torn. Features exceptional performance in cold temperatures and accommodates freezing down to -22F.