Seen people do it a lot of ways, rooted or unrooted, in bags or in clone shippers. Started receiving and sending unrooted clones many years back as a friend insisted it skirted laws about what was or wasn’t a “plant” but also for convenience. I’ve kept unrooted clones in the fridge for probably close to 3 weeks before space cleared up in the cloner and got em to work. No issues rooting em. Fresh cut at the bottom before rooting and good to go
I send my clones with roots on them wrapped in a damp paper towel. I seal that in a zip lock then put it inside a turkey oven bag.
“what are you sending in the mail?”
“It’s just a tiny plant”
“awww a tiny plant!”
Other mail lady: “Your plant stinks.”
Cut bottom of bottle put grow cube with clone inside bottom of bottle , make sure you bubble wrap the bottom stem/branch of plant to secure it from moving around, , slip top over plant,
tape bottom place in box…
I ain’t the best but I have sent around 36 within the states … just make sure your cubes are moist enough to feed your plants 3 days… not drenched lol