Back A common misconception is that inserting the handle of a teaspoon into a bottle of sparkling wine during bottling ensures its proper preservation. However, tests carried out by the CIVC (Comité Interprofessionnel du Vin de Champagne) have shown this method to be ineffective, as it does not prevent carbon dioxide from escaping. Only special pressure stoppers should be used, and under no circumstances should vacuum systems such as Vacuvin be used.