Why use a Ball Canning Jar?
The Ball canning jar was more about the lid than the jar. The lid would seal shut with a tight vacuum seal and then the screw lid secured around it would hold the lid in place. Metal was not an option as it would taint the food and plastic would melt away as the boiling hot canning products were placed inside. The glass Ball canning jar was the obvious option and has worked well for centuries.
