A combo of Did you know's I discovered when looking up a thing for a thread! The Thermos!
"While we generally use them to keep our drinks hot, vacuum flasks were invented by James Dewar in 1892 to keep things very cold."
"Dewar was interested in cryogenics, the science of extreme cold and in 1898 he was the first person to make liquid hydrogen, which at the time was the coldest substance ever produced."