Syringe

A syringe is a simple pump consisting of a plunger that fits tightly in a tube. The plunger can be pulled and pushed along inside a cylindrical tube (called a barrel), allowing the syringe to take in and expel a liquid or gas through an orifice at the open end of the tube. The open end of the syringe may be fitted with a hypodermic needle, a nozzle, or tubing to help direct the flow into and out of the barrel. Syringes are often used to administer injections, insert intravenous drugs into the bloodstream, apply compounds such as glue or lubricant, and measure liquids.

Hero: The Guardian Smurf stories
Syringes first appeared in the story "Smurfette's Crazy Love", where Doctor Smurf used it to get a sample of Smurfette's DNA in order to find out why she was acting so strange around Hero, where it was later confirmed that she had an increased level of hormones.

They appeared again in the story "One's True Origins", where Doctor Smurf used it get a sample of Miracle's DNA in order to find out what was causing her to have mysterious visions on the eve of her 70th birthday, it was later confirmed by Papa Smurf that a part of Smurfette, which still remained loyal to Gargamel, but laid dormant for many years, had now been passed down from Smurfette to Miracle.