If you ask anonymously it shows up for everyone to see once they reply. They need to add it to their profile. Send them an anonymous message telling them to do so.
pop...you can mail to someone using only a name and a zip code if they do t want to share their full address. they will just have to go to the post office to pick it up.
although I'm afraid you may have outed yourself to your recipient if so.
In my experience if you are honest at the UPS branch they will not accept the package and will tell you to go to the regional hub. Storefront branches aren't allowed to accept alcohol. If I had said it was perfume instead of booze it would have been fine though.