I saw a new one recently. I relieved the police to watch a patient they brought in for pysc assesment. The woman had lip stick turned shank. From the outside it looked like the run of the mill lipstick tube, when the lid was removed there was no lip stick inside, just a nastly looking blade.

The police almost didn't find it. It was only discoverd after a second search of her effects by a senior officer who happend to be in the Hospital on an unrelated incident.