I am a frequent flyer (read over 3,000,000 miles on a certain airline). And I can tell you the TSA is about as capricious as our alcohol laws. That is I have flown the same route and the same plane weeks on end. Each time taking a growler with me. And in one of them it was taken by a TSA agent. How do I know this, because they left one of the cards that said they checked it. When I called to get my growler back I was told the TSA does not keep the items, but instead destroys them. It really was a nice growler, I will miss it.
That being said please keep in mind the TSA often does not follow its own rules. I can tell you of times I have (mistakenly) carried on butane lighters (they have never been allowed on planes), knives, my wife's SIG250 (in our checked backs, undeclared) and bottles of water through the scanner. Yes all of these should have been picked up by the TSA.
All this being said, it is all anecdotal information. It is much easier to ship it though UPS. You will know where it is, can insure it if you like, and have more room in your baggage. Obuet the best advice I can give you, as a frequent user of their services, is to avoid the Kabuki theater that is the TSA as much as you can.