Had a flight MSP-DEN a few weeks back and was sitting across from the FA in row 36 with my buddy. We chatted up the FA during taxi and takeoff and he asked what we wanted to drink. We told him we'd like a beer and he brought back 2 for each of us, but then told us to keep the 2nd one between our legs or in the seat on the side of us so it wasn't obvious. I'm not sure if that's because he was just giving them to us for free or because he was only supposed to be giving us 1 at a time.