Sonic lipstick

The sonic lipstick was a device regularly employed by Sarah Jane Smith similar to the sonic screwdriver owned by the Doctor, while resembling a real lipstick closely enough not to seem suspicious.

History
The Doctor had left the sonic lipstick for Sarah inside a sliding panel on the side of K-9 Mark IV. (Sarah Jane Adventures website)

Following the destruction of one of the devices by Sontaran Commander Kaagh, she later produced another. (SJA: Enemy of the Bane) The Doctor may have created two for her, or she may have built a duplicate using the one she had along with Mr. Smith or K9.

Features
The sonic lipstick looked exactly like a normal lipstick on the outside. The lid came of and it twisted to reveal the emitter. When in use, the sonic lipstick generated a pinkish-red light, and produced several sounds. Like the Doctor's sonic screwdriver, it also remained ineffective against deadlock seals and wood. (DW: Silence in the Library) The Slitheen described it as a sonic disruptor, (SJA: Revenge of the Slitheen) and Sarah Jane once threatened to destroy a talisman with sonic disruption. (SJA: Eye of the Gorgon)

Uses

 * Unlock and open and close doors. (SJA Invasion of the Bane et al.)
 * Sending an electrical charge, and cut cables. (SJA: Eye of the Gorgon)
 * Interfering with Mr. Grantham's comms device and to UNIT soldiers causing a very high-pitched noise. (SJA: Warriors of Kudlak, Enemy of the Bane)
 * Disabling a cloaking field on a sontaran ship. (SJA: The Last Sontaran)
 * Destroying two sphere-shaped drones. (SJA: The Last Sontaran)
 * De-activating Kaagh's control device. (SJA: The Last Sontaran)
 * Seizing the joints of robot clowns. (SJA: The Day of the Clown)
 * Cutting a piece of meteorite. (SJA: The Day of the Clown)
 * Shattering a glass mirror. (SJA: The Day of the Clown)
 * Using it against an alien life form, but it is unknown what the sonic lipstick actually does to the alien life form. (SJA: The Mark of the Berserker)
 * Disabling a car engine. (SJA: The Temptation of Sarah Jane Smith)
 * Sarah-Jane once claimed she could destroy the Gorgon's portal key with sonic disruptions from the lipstick, but this was never shown. (SJA: Eye of the Gorgon)

Mark II
The Mark I was destroyed by commander Kaagh standing on it. (SJA: Enemy of the Bane) Then Sarah Jane Smith had another sonic lipstick in her bag, using it destroy the Tunguska Scroll and indicating that a girl can have more than one lipstick. It's unknown if the Doctor built more than one or if Sarah (perhaps with the help of K-9 or Mr Smith) made a duplicate.

Uses

 * Destroying the Tunguska Scroll. (SJA: Enemy of the Bane)
 * Teleporting a Slitheen back to its home. (SJA: From Raxacoricofallapatorius With Love)
 * Destroying a communication system. (SJA: Prisoner of the Judoon)
 * Smashing glass. (SJA: Prisoner of the Judoon)
 * Releasing the Nanoforms into the genetic system. (SJA: Prisoner of the Judoon)
 * Locking on the Nanoforms to Clyde and Rani. (SJA: Prisoner of the Judoon)
 * Breaking into a theme park. (SJA: The Mad Woman in the Attic)
 * Opening the door in the nursery. (SJA: The Eternity Trap)
 * Trying to disable the machine the Slitheen built. (SJA: The Gift)

Behind the scenes

 * Character Options released a sonic lipstick replica featuring lights and sounds. The toy was slightly different from the original, in that the ridges in the actual prop are less deep (SJA: Revenge of the Slitheen, The Last Sontaran) and the coat was shiny metal rather than bland brown plastic (SJA: Revenge of the Slitheen, The Last Sontaran)
 * The origin of the sonic lipstick, while given on the SJA website, is not mentioned on screen. The closest reference occurs in Invasion of the Bane when Sarah Jane invokes the Doctor's name when using the device.