It was during the post-WWII military drawdown that Dutch inventor Sigurd von Blatz first beta tested "Howie," his refurbished Howitzer-cum-cocktail-delivery-system. Town leaders readily agreed that Howie's range and accuracy were impressive, but pointed out that a 1-in-6 customer fatality rate on daiquiri air deliveries was in excess of local Red Cross specifications.
With a bit of fine-tuning, Sigurd had Howie happily serving malted milkshakes, mojitos, margaritas, martinis, and rumchatas to a delighted Rotterdam clientele. Predating Grubhub, DoorDash and Uber Eats by decades, Howie became a strictly hand-delivery service (so as to abide by NATO's twelve-block "non-explosive" pedestrian zone).