For those who don't know, Bulletproof is a well-known Ghee maker in the US. Having said that, any Ghee can be refrigerated or stored in an open pantry.  As I mentioned in the above guide, it all depends on how long you wish to preserve it at home. If you wish to enjoy it regularly, you can keep it outside for at least 3-4 months. However, if you use it once or twice a month, it'd be wise to keep it in the refrigerator.