I've been interested in cryonics for a number of years. In case you don't know, cryonics is a name for the idea of freezing bodies shortly after death and keeping them at a very low temperature until such time in the future as they can be thawed and the person revived and cured of whatever ailed them. In the way it may be possible to extend the human lifespan. Cryonic suspension has not been shown to work on mammals, so supporting research is essential if it is ever to become possible. The leading cryonics research organization is a for-profit corporations, 21st Century Medicine , headquartered in Southern California.
Vitrification is like how glass exists.
A pane of glass is actually a liquid, just a very viscous one. If you look at an window that's a hundred years old or more, you will notice that the bottom is thicker than the top. Sometimes a crystal will form in an old window pane, also. It is possible now to arrange to be frozen and stored at liquid nitrogen temperatures after your death. No one knows if the cellular damage that happens during freezing can ever be undone, however.