What everyday object that you use today was popularized/hosted its first public successful experiment during WW1 and WW2?

This is the second part and I'm not sure what everyday object you use today hosted its first public successful experiment during WW1 and WW2, but I can tell you that a lot of everyday object we use today hosted their first public experiment during wars. <br><br><br>Some of these objects are: airplanes which is obviously a popular mode of transport, plastics, helicopters, jet engine, computers which is the reason we're having this conversation today, internet, zippers, superglue, traffic lights, GPS, cellphones. <br><br><br>However, I noticed that the first publicly successful experiment which popularized an everyday object we use today was carried out in WW1 using gas. <br><br><br>But gas itself wasn't an everyday object.<br><br><br><br>So I thought the first experiment was carried out by a German chemist named Fritz Haber using gas. <br><br>However, the first successful experiment which popularized an everyday object we use today was the parachute.<br><br>The parachute is an everyday object that is used in emergency situations today.річ