FYI, re: the open top...
I had carried a Fox OC 2 oz. in my pocket for some time. I had my key chain in that pocket, too, and once bent over or squatted down to pick something up. Well, one of the keys jammed itself horizontally between my thigh and the OC activating button. I felt a stinging, cold sensation on my thigh and saw a small, pepper-colored stain appear on my pants. Obviously the key had jammed itself down on the OC button and I had sprayed myself! The pants were ruined (even after a wash), I had to clean my leg (it was cold from the propellant?) and -- even though only a small amount of OC was sprayed, and it was completely absorped by the material -- there was a slight stinging in my eyes and shortness of breath.
I still carry and would carry Fox OC. IMHO, don't carry anything else in that pocket. Or, get the new flip top. I got holsters with both of my 2 ozs, BTW. Have never used them. I just carry in a pants or coat pocket. It's quicker and more discreet.