Zones - you're right. Even if the Pouilly Fuisse bottle on the trolley two feet from me doesn't break on the seat back, it's still as good as a baseball bat. I try to minimise the risk by reducing the contents and thus the weight of the said bottle.
BTW, anyone done LHR-NRT recently with the world's favorite? The new cuisine combined with the plastic cutlery is surely worth a small refund on the fare. Still, the sleeper beds more than make up for it