While he could not completely control the process, Perignon realized that changing the bottles in use at the time might help reduce breakage. The thin-walled, apple shaped bottles with long narrow necks could not withstand the pressure of the fizzing champagne at ninety pounds per square inch. Don Pernignon convinced the growing glass-manufacturing business in the area to make thicker bottles in the classic pear shape we recognize today. The old stoppers made of chestnut wood, dipped in tallow, could not stand up to the pressure either, so Don Perignon turned to Spain to provide him with corks.
Don Perignon is also credited with being one of the first wine makers to blend wines. A fellow Benedictine cellar master at a nearby abbey adopted his blends emphasizing clarity and complexity, along with his methods of fermentation. He continued Perignon's custom of adding a liqueur de tirage just before bottling to insure a second fermentation. Today wine makers' liqueur de tirage includes sugar, wine and yeast.