Another perhaps useful nod. Bottle square or round.nod
The output is five solids. I left them separate rather than using 'Union' inside the nod as I thought that the output would be slightly more convenient in that form, though I'm having second thoughts as I type this!

Below shows that sort of bottles that can be produced with the nod. It will not generate oval bottles.
NOTE that the neck is plain - required threads or bead have to be generated separately.
Mike.