Lots of bubble wrap and ship it as a collectible. Actually had a person in front of me who said it was a bourbon bottle and they said they couldn't ship it, but then when they said it was a collectible Kentucky Derby bottle they allowed it. Obviously I wouldn't mention it, but it has happened before even when they knew the contents. I have personally shipped a dozen or so liquor bottles and a 12 pack of beer, well sealed and labeled as "Fragile" and "Heavy" with no problems. There is also some theory that says if things are wrapped in tin foil there isn't much they can tell, thats how I shipped the old Club Stogie matches with no problems. All with no mention of liquid or alcohol with no issues.