I checked in two 12 cases of Chianti at PSA last year, double boxed with extra padding. We were Tannoyed in the lounge and escorted (very respectfully) airside to a dispatch area to identify our luggage. They advised it would be okay on this occasion as they would sit at the bottom of the hold. As a courtesy to other passengers I should always get it wrapped by the cling film thingy before checking in and there would be on issues.