Don't attach to much stuff to your camera bag. Saw some people with tripod, bottle and lens pouches attached, all happily dangling around and making the bag even bigger / bulky. I got a Cokin filter holder from OP (20-25 bucks, can't remember), comes with Velcro holder for belt and some small sling belt for neck / shoulder. Well built, I sling it around waist instead of hooking to belt. I guess there are other makes and brands out there, same price or cheaper, same style or different.