clone?

what is the safest way to transport clone?? and at what size is good to take a clone at? like anyone that is at least 6inches?? asking because i have access to some clones but its a few hours away from me. i dont want them to die on me.

just put them in a box and drive safe... six inches would be fine, they could be even a little smaller than that, but of course the bigger the better.