Both UPS and FedEx officially won't transport alcohol if you claim it as such and you are not licensed. If you want to ship it needs to be claimed as something different. Many clerks will turn a blind eye to it. Their was someone that mentioned claim it as artisanal olive oil which is fine to get it shipped, but they also mentioned it will help insure it. Insuring it is a waste, if it breaks and it is alcohol and not olive oil they will not cover the claim, trust me on this one! Technically they could also come after you for Illegal interstate transport of alcohol as well. Pretty sure that is very low on their priority list though.
After saying all that, "from what I have heard" if you want to ship more than one bottle you will need to mask the "glug" sound. That can be done with foam, bubble wrap and putting something in a disposable Tupperware container (I know of someone who got dog food). Then tell the clerk it is organic dog food for some high maintenance pet owner. Make sure the goods are packaged well so breakage isn't a problem. It is not possible to over pack.