Not sure on your question. But I make root beer in a clean 2 liter bottle. You got to have a cap on it, and beable to squeeze the bottle. It is done when you can't squeeze the bottle, it is hard. Hope that helps
I agree with Michele. I made rootbeer one time and the recipe told me to put it in 2 liter plastic bottles and lay it in the bathtub on it's side just in case it were to explode. It did just fine.
Hey ladies, We put them in the glass bottles and then in a plastic bin (so no shards of glass would come flying at me while cooking). I will let you know if we have any eruptions :)