Is it really worth the effort. The Bottle could easily break, this would ruin your clothes and the first get out clause the Insurers or Airline would use is that you were breaking the law.
Buy him something:
A] You can't get in the USA
B] Is Legal
c] Will not easily break
With the new no Carry-on Bottle Rule it's so much more convenient, if you are over 21, or 18 in most sensible countries, to go to the local liquor shop.