In the mid-1960s, I started selling tourist trips to socialist countries, and my parents were among the first to make such a trip to Czechoslovakia. They were fed in decent restaurants, where everyone was sitting tight and whispered to the waiters. To ease the tension, my dad offered to drink a little and poured the lickers to the ladies and the men - waterbones from the bottles standing on the table. “Likerchik” was oil, and “vodka” was vinegar. Then this case was told on all instructions before the trips.