SHELF-LIFE OF COFFEE BEANS Coffee Beans have no 'Expiry Date' but a 'Best Before Date'. Best Before Dates are for food with a longer shelf life such as cereals, nuts, and coffee beans. They indicate how long the food will be at its best quality. This applies only to a perfectly intact packaging. Coffee Beans are Nitrogen flush upon packing. If the packing of the beans is damaged, has a hole, or the bag has been opened for more than 2 weeks, you might consider disposing the beans as it will not produce the result in the cup as expected.