The griots Aero Air Can Sprayer lets you put your own chemicals into a can-style sprayer; just unscrew it, fill it, pump it up with air, and spray away. 

I think it's cool, and for some applications, I'm sure it makes sense, but for me, I just didn't need them, so we are selling them at clearance for you. I ordered a handful of them when we originally launched Griots but I just never found a use for them over my beloved Pressols.