I’ve had too many incidents of my duty free liquor being confiscated by TSA once I arrive back in the US and have to connect to my next flight - in spite of the so-called “approved” TSA sealed bags.
The war on liquids bullshit even extends out to places like Hong Kong and Singapore where they do a secondary screening at the gate for any contraband liquids.
I don’t take the risk of buying any duty free liquids when traveling internationally anymore.