Breakfast was a rarity in my house, so my answer is confined to lunch and dinner. And that answer is iced tea. Lipton. In early childhood, the tea was sweetened, but then mom erected a stele of Hammurabi and we switched, evermore, to unsweetened.
That was practically our sole drink with meals. I think I may occasionally have had a soft drink (usually Coke) with lunch, but that was a rare exception. And my parents NEVER had alcholic beverages with their meals.