How Long Will Beer Stay Fresh in a Mini Keg?

As long as the mini keg has not been tapped, and you keep it refrigerated, it should stay fresh for several months. However, once the keg has been carbonated (or filled with finished beer from a larger keg) it is ideal that you plan to consume it within 2 - 3 months. After the mini keg has been tapped, the beer will be best if consumed within 3 - 4 weeks.