US Patent 8439212 Tamper-evident container closure with flip-top cap

A closure includes a body adapted to mount on a container having a discharge outlet and a cap configured to move relative to the body from a closed position covering the discharge outlet to an opened position uncovering the discharge outlet. The closure also includes frangible links coupled to the body and cap that break in response to first-time movement of the cap from the closed position to the opened position to alert an observer that the cap has been opened once before.