#This example is meant to be used from within the CadQuery module of FreeCAD.
import cadquery
import Part

#Set up the length, width, and thickness
(L,w,t) = (20.0, 6.0, 3.0)
s = cadquery.Workplane("XY")

#Draw half the profile of the bottle and extrude it
p = s.center(-L / 2.0, 0).vLine(w / 2.0) \
    .threePointArc((L / 2.0, w / 2.0 + t),(L, w / 2.0)).vLine(-w / 2.0) \
    .mirrorX().extrude(30.0, True)

#Make the neck
p.faces(">Z").workplane().circle(3.0).extrude(2.0, True)

#Make a shell
result = p.faces(">Z").shell(0.3)

#Boiler plate code to render our solid in FreeCAD's GUI
Part.show(result.toFreecad())