The spray is neat and I might get one for the kitchen(to accompany my bigger one).
However, I’m not sure I would want to spray my Glowforge with that stuff. Biodegradable or not, the liquid could damage components.
I ordered a halogen one that @Christopher tracked down on Amazon.
http://community.glowforge.com/t/source-for-co2-fire-extinguishers/2044/58?u=soldiercoleman