Readiness issues with liquid oxygen rockets historically retired them from the ICBM role once alternatives became practical (be it storable liquid or solid fuels). Yet one technological curiosity was an attempt to work around the issue.

A variant of the R-9/SS-8 ICBM with the typically obtuse Soviet industrial designation of 8K77 had the vacuum flask principle applied to its oxygen tanks. At least in theory, it would keep the liquid oxygen cold long enough for a fueled missile to wait on alert in a crisis. Vacuum flasks are of course better known in the capitalist west by their brand name turned generic name, the thermos.

It would be very cold and then very, very hot.