Hi Corey, you don't necessary need brown bottles. You can use normal ones and wrap them in silver foil: they'll be protected by light and by anything else could damage Colloidal Silver .
I've been using the SG6 for a couple of weeks and I'm very happy with that as well. I've ordered now a pocket PPM tester in order to measure exactly how many ppm my Colloidal Silver is. I'll let you know!