I have a spray bottle that goes on the end of a hose pipe for foaming. It worked decently the few times I have used it, although I probably used the snow foam a bit too sparingly as well.
(This was before I knew about the Demon Shine one... now I would just buy the Demon Shine and keep the bottle once it's empty and fill it with whatever product you want.)

A side note on snow foam, not sure if anyone else has had this... I had a big bottle sitting in an outside storage thingy and noticed that the snow foam that was once almost full was now almost empty. Figured it must have just got a hole in the bottle, and transferred the remaining snow foam into an empty mineral water bottle. A few weeks later I returned to find the new bottle empty!

Either I have some rodents that like snow foam or the stuff is corroding through the plastic. I've noticed it stings when you get the neat stuff into a cut on your hands and it sometimes leaves discoloration when I have spilled it on stuff.... So yeah you don't need to use much because it's so concentrated but the inverse is it's pretty strong stuff when neat.

Still need to try some of this