Online since 24 years. Founded 1996 by Günther W. Frank
I mail Kombucha cultures like this: I put the culture including a glass (about 9 ounces) of ready fermented beverage (very important!) in a plastic bag, like one use it for deep freezing food in a deep-freeze. Then I seal the bag with a bag sealer. This bag I put into another bag which I seal again. So it is double sealed. For mailing I put the double sealed bag into a box and fill the interspace with styropor flocs.
Thus I already sent cultures round the whole world, and they all arrived in good order.