You can store these buns in an airtight container at room temperature for around 3-4 days. However, keep in mind that like any homemade bread, these will lose their moisture as time goes by.  I highly recommend eating them within the first two days. If you’re living on your own or in a small household you can also make a smaller portion. Alternatively, you can also freeze them and re-heat in a microwave when ready to serve.