For me, the best way has always been to place them in the JZ BZ Top Bar cell protectors and carry them in JZ BZ Queen shipping cartons (Dadant catalog pg 58). I've also carried them in a homemade box with a horizontal cardboard divider with appropriate size holes for the cell protectors (suspend the cell protectors). Whatever you do, don't leave them in a hot vehicle or in the sun; they tend never to emerge and they taste bad when cooked in this manner!