I usually forget to add this but a member just asked a question pertaining to shelf life so I will also post it here.

Shelf life unopened will last many years, can't really say just how many because I've never seen it go bad. Once open keep in fridge,will last years that way. If ya have more than 1 jug put the others in the freezer and it'll last forever. Syrup will not freeze cause of the sugar content and once brought up to room temperature it'll be just like it was to begin with. If ya ever have some that is opened and left out of fridge for a period of days and you notice it has what appears to be mold, although it isn't and is harmless but you want it gone just heat the syrup up to about 185-200 degrees and the stuff will float and ya just skim it off, rinse the jug and pour the syrup back in. At camp we have forgotten to put it away for near a week and it didn't change but was a cooler time of year, summer heat may be different.