I had a look, but I didn't see this question specifically asked, so please forgive me if I missed it.
In Interstellar, the occupants of the cryo-sleep chambers are at least partially submerged in a clear, water-like liquid. When Dr Mann is revived, he had the liquid over his mouth but not in his lungs. What would be the reason for this? Could it be easier to regulate the temperature? Is this why they are inside those bags? Does that keep the liquid out? I notice when the crew go to sleep for the trip to Saturn, they seem to step directly into the liquid, then the bag or membrane seems to close over their bodies. They then seem to have to tear these off to exit the chamber.
Sorry, it's a bit of a compound question :)