About 25 years ago, one of the BMCs experimented with a CO2 cartridge in beer cans and got the cooling cycle down to 40 seconds.
"salt and ice in the same one to ten proportion" This will give you 0F brine. Historical fact: that is how the zero point was established by Fahrenheit.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk