OK, let's move on from chloroform since that proved to be a dead end. :banghead:
I took a look at what was found in the Gatorade bottle, the syringe, and the Crystal Light bottle. Here I summarize what the chemistry lab found. Later I will try to do the same for the toxicology lab (which is where the testosterone was noticed). I have sorted the compounds in order of greatest to least abundance, and I have added a little comment as to the possible purpose of the compound.
From the Gatorade bottle:ethanol - Denatured ethanol is a solvent
dodecanol - Surfactant
limonene - Solvent
turpineol - Herbal oil
n-tridecan-1-ol - Used in cleaning solutions
2-methyl-1-undecanol - Used in cleaning solutions
7-Octen-2-ol, 2,6-dimethyl - Aromatic used in soaps
dodecane - Solvent
tetradecyl trifluoroacetate - Used in insecticides
1,7,7-trimethyl-bicyclo[2.2.1]hept-2-yl ester - ?
tert-butanol - Used to denature ethanol
eucolyptol - Frangance, insecticide
acetone - Used to denature ethanol
IMHO, it looks to me like the Gatorade bottle contained a household cleaner or possibly something like a degreaser. There may have been a mixture of cleaners. Clearly it was not Gatorade or anything one would want to ingest.
From the syringe:dodecanol - Surfactant
Butylated Hydroxytoluene - Anti-oxidant used in food preservation and other industrial purposes
ethanol - Denatured alcohol is a solvent
limonene - Solvent
turpineol - Herbal oil
dodecane - Solvent
undecane - Attract moths, cockroaches
tetradecane - Cosmetic use?
As with the Gatorade bottle, the syringe contents suggest some form of a cleaner is present, although it does not appear to be identical to the contents found in the Gatorade bottle. Again, this appears to be a set of chemicals one would not expect to find in a syringe.
Given the testosterone was found in the toxicology analysis, my initial reaction is that the syringe was used to inject steroids and discarded. It was later found and used to hold a caustic substance.
From the Crystal Light bottle:2-Butanol - Solvent, also converted to Butanone
methyl ethyl ketone - Solvent, denaturing agent, cleaning agent
Methyl Alcohol - Solvent
Disulfide, dimethyl - Insecticide - contributor of urine smell
P-cresol - Disinfectants, insecticides
Anisole - Aromatic in perfumes and insecticides
Methyl Isocyanide - Pesticides
cyclohexane, [(1-methylpropyl)thio]- - Fungicide, insecticide?
Trimethylamine - Manufacturing use. Main source of urine smell
Phenol - Antiseptic, herbicide
2-Nonanol, 5-ethyl- - Fungicide, insecticide?
Benzothiazole - Industrial use - binding agent?
1-Methoxycycloheptatriene - Use unknown, seems to be a neurotoxin
Once again, what appears to be cleaning fluid, insecticide, deodorizer, or some mixture of the above is found in the Crystal Light bottle. Not what one would expect to find.