After removing the cork from a sparkling wine bottle (sparkling wine, champagne), its shape also reveals something about the storage period. If it is wider at the bottom (foot), it is known as a "juponne" (jupon = petticoat) and the bottle was probably corked less than a year previously. If the foot is narrow, it is a "Cheville" (cone), which means that it was corked some time ago. As a rule, a sparkling wine should be consumed as soon as possible; a "juponne" is therefore to be understood positively. See also under agraffe.
For my many years of work as an editor with a wine and culinary focus, I always like to inform myself about special questions at Wine lexicon. Spontaneous reading and following links often leads to exciting discoveries in the wide world of wine.
Dr. Christa Hanten
Fachjournalistin, Lektorin und Verkosterin, Wien