This is what i use. Holds a medium sized camera, water bottle and lots of small things. Has a strap to carry with you after (cant remember if its a backpack style or shoulder sling). Holds on with 5 magnets.
"If God does not exist, then you are just a miscarriage of nature, thrust into a purposeless universe to live a purposeless life." - Dr. William Lane Craig
"Wrong is wrong even if everybody is doing it, and right is right even if nobody is doing it." -Augustine