from the Sentinel article sited above
FBI lab technicians detected traces of chloroform inside a sports drink and plastic syringe recovered near the scene where the remains of Caylee Marie were found in 2008.
Those details and others are included in the more than 2,100 pages of documents released today by the State Attorney's Office in the criminal case against Casey Anthony -- the 23-year-old accused of killing her daughter last year.
The report from the FBI's lab shows the Cool Blue-flavored Gatorade drink contained an "unknown liquid." The bottle also contained a plastic bag labeled "Disposable Syringe Kit" with a plastic syringe inside of the bag.
I am a nurse, usually in these kits, you can screw the needle on to the syringe, in other words, there is the barrel, which contains the fluid, and the needle with a cover which screws on to the syringe.
Usually babies meds are dispensed orally with the syringe & just squirted into the mouth
A report generated in June and labeled "Summary of results" by Dr. Michael Rickenbach of the FBI indicates chemical tests show the syringe contained chloroform, testosterone, ethanol and water.