The opthlalmic version is perscription only.

I had a small screw top pill vial that I used to repackage the PowerBait. That and the other fishing gear fit in a small tin I picked up off the ground at the gun range. It orginally held percussion caps.

I think it will fit the larger Nalgene bottle, but not sure. I got the pack from Sierra Trading Post a few months ago. I picked up the shoulder straps at a going out of business sale at a local outdoor shop. I really like how well made it is. I have a small MS pack that is about 4 years old and no problems at all.