If maintained properly, rum balls usually have an excellent shelf life. If maintained in an airtight container, they can last up to two weeks in the refrigerator. Up to three months ahead of time, you can freeze them for longer term storage. Just make sure that before serving, they are thawed in the refrigerator. Savor your delicious delights!Hey foodies! I whipped up a batch of rum balls, but I'm unsure how long they'll stay tasty. Can anyone tell me their shelf life before they start to spoil? Hmmm, Any storage tips would be awesome! Thanks a bunch!