If you guessed honey, then you're absolutely right. For we've all heard about how honey is a remarkable substance. We've heard about how it "doesn't go bad". Or about how archaeologists found unspoiled, 2000-year-old honey in an Egyptian tomb.
For example, honey was the most popular ancient Egyptian healing remedy (and was mentioned over 500 times in 900 remedies.)
I still remember how one patient, Rachel, just stood there, staring at me with her mouth open.