ketwithchupts

This disclosure relates to an unexpected increase in the strength of Sugar Packing Machine of the champagne type by the addition of ribs internally of the preform when the preform is axially stretched prior to the blowing thereof within the Blow Moulding Machine . Most particularly, by adding internal ribs to the interior surface of the bottom defining portion of the preform, the preform has the bottom forming portion unduly strengthened against shrinkage in wall thickness when the preform is axially lengthened through the use of a stretch rod.