A set of color gels are incredibly useful to have around any studio whether you are a still photographer or a filmmaker. They aren’t even that expensive. You can pick up a set of 24 Lee gel filters online for under $40. Definitely worth the investment, BUT if you get caught without a set or just like the challenge and sense of accomplishment of a DIY project, you are going to want to take a peek at this short video from film maker, Ryan Connolly, as he shows us how we can replicate the look of a color gel using nothing more than a light source and a bath towel.
I guess that snoots are one of those things that you can make out of almost any substance. As a kid, I used to listed to Dennis Leary and he had a similar notion on bongs (you can listed to this very NSFW, rude and strong languaged track here).
Of course being the shy and straighter than ruler guy that I am I would not even know a bong if I saw one, but I would recognize a good snoot idea.