RCO, here is a Jocko can I found while fishing about 25 yrs ago. It was in a bunch of litter under a tree off a logging road near Chapleau in Northern Ontario.
Different design but likely the same company.
My dad used to buy me Jocko when I was a kid. You had to give it a good shake but it was delicious.
I'm not seeing any pictures either, although I can tell from your description alone that it's a good one. It's definitely some sort of soda bottle and probably a fairly early one. I don't know about...