We've already seen one way the British tried to keep themselves safe during the Second World War - and now here's another! The fear of a gas attack by the Nazis was constantly high, and so people would routinely wear gas masks to go about their daily business.
Fitting a gas mask to a baby was impractical, so somebody came up with the invention of the gas resistant stroller. We imagine it sold thousands of units during the war, and not a single one as soon as the war was over.