The G.U.N. Lipstick Laser is a standard issue tool used by agents of the Guardian Units of the Nations. It is made to look like a normal tube of lipstick, but is in fact a laser capable of cutting glass.
Somehow, the Rogue Rouge was able to get her hands on a G.U.N. Lipstick Laser, which she used to steal the Moon Emerald. She then discarded it in the museum, where it was later found by G.U.N., who identified it as one issued to Rouge herself. Rouge later use it herself to break free from a trap.