is a tube with a nozzle and piston or bulb for sucking in and ejecting liquid in a thin stream. Syringes often have hypodermic needles on the end to inject fluid.
In Snospis Eht: Sick Bart part 2: A trip to the Seaside., Bart is seen lying in his bedroom with syringes injected into him. Later in the episode, Bart and Lisa inject syringes together.
In a short trailer for Mouse Tails called New Mouse Tails Soon!, Lisa and Marge inject syringes full of heroin.
In Mouse Tails Episode 04: The Adventure Begins?, a syringe is seen lying on the ground.
In Snospis Eht: Marge's Juice, Maggie is seen selling syringes of morphine to Fissmans.