Wiktionary
cryotube
n. A plastic sample-tube that is able to stand very low temperatures
Usage examples of "cryotube".
He took one vertiginous step out of the cryotube and stopped, staring at the naked face of chaos worn by a berserk maintenance robot.
It looked like a ten-gallon stainless steel thermos, and when I unscrewed the lid, I pulled out seven cryotubes so old that instead of plastic, they were made of glass.