Wirelessly posted (iPhone 4: Mozilla/5.0 (Linux; U; Android 2.3.6; en-gb; GT-I9210 Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1)
Hope I am not posting it too late but if you arrive into hkg before 10pm, there's duty free shop on arrival air side for you to by duty free to save the hassle. (of course assuming the one you are getting is not US only booze)