Not a ginormous bottle that gets warm before you finish, but not a 330 ml Coke can size bottle either. The perfect bottle size. Later on they introduced this innovation that allowed you to see if it was at the 'perfect temperature' as if touching the bottle doesn't let you know if it's cold enough or not
reading about booze on wikipedia is endlessly fascinating:
In the 19th century, prior to the advent of refrigeration, German brewers would dig cellars for lagering and fill them with ice from nearby lakes and rivers, which would cool the beer during the summer months. To further protect the cellars from the summer heat, they would plant chestnut trees, which have spreading, dense canopies but shallow roots which would not intrude on the caverns. The practice of serving beer at these sites evolved into the modern beer garden.