What are you referring to? Isn't that just a food grade C02 cartridge?
Which I know the put (or used to put?) in canned whipped cream. In this case, though, is that the actual propellant?
Also - fun tip - if using stuff for food, make sure you use food grade c02 cartridges. I know a guy buying the ones used for pellet guns or paintball guns for a seltzer water, until his friend dumped a whole cartridge into the air and let him smell the vaporized lubricant they include in them.
I was introduced to it in the book Aliens: Tribes illustrated by Dave Dorman (which I eventually go signed!)
I thought that was a Star Trek reference. Didn't HK-47 refer to humans as meat bags?