On a flight from JFK-MIA, I asked for a gin and tonic. The FA handed it to me and i cupped the drink from the bottom, but had not had a full hold of it. The hand-off was incomplete and i spilled it on the FC seat next to me. Luckily that seat was empty, and we were able to clean up the mess before the pax sitting in the seat boarded the plane. He was none the wiser.
From then on in that flight, the FA placed it on the pull out drink tray.