Australia goes a little strong with the busting imports thing. Brazil too. Worst I've seen happen in america was a seizure letter. ("We got it now, itss illegal, you have a problem with that, come in and we'll discuss it") What they're worried about is proving that you're actually the one it was intended for, that's easier said than done. Its not customs that gets you, its the local postmaster, or the fed, they decide of they wants to deal with all the b.s. of setting you up, proving its actually juice, proving you ordered it, proving you accepted it with knowledge, and paying the whole crew of people and their gear to hang around until you decide to pick it up and give them said proof (or not)
Not to mention court fees, lawyers, all that for 500-1000$ worth of gear? For the prosecutor to drop it all down to simple poss. Of a class 3, that's all of a year probation.
...for 20 vials of juice? Probably not. There's worse things out there, like, I dunno, actual Dangerous shit?