This homemade honey caramel sauce should be stored in an airtight (preferably glass) container, in the refrigerator. Properly stored, it should last for up to two weeks. Before using it again, you may want to gently reheat the sauce to restore its pourable consistency, as it tends to thicken when chilled. Feel free to reheat it in a microwave in short bursts or over a double boiler on the stove, stirring occasionally.