It's clearly a specimen cup.I just took delivery of a 2021 JL Rubicon and found this loose plastic part lying on the engine under the hood.
Does Anybody Recognize This Part?
Reminds me of the old man who was hard of hearing & went to the doctor. Doctor asked him three times for a urine, semen & stool sample. Exasperated, the old man turned to his wife & shouted 'WHAT DID HE SAY???' The wife shouted back - "HE WANTS YOUR UNDERWEAR!".
Some sort of "Medical Specimen" cup maybe???...drug dealer delivery apparatus ???
Better check and seat your fuses.
Most likely a thread protector or electrical component plug of some sort