On October 21, the finest in sparkling wine and high design will rise to the surface when the Vertical Limit Champagne Cellar becomes available at the Sotheby’s Finest and Rarest Wines, Spirits, and Vintage Ports auction in London. One of only 15, the freestanding Champagne citadel is the collaborative expression of Veuve Clicquot and Porsche Design Studio. Twelve magnum-sized bottles can be ensconced within the refrigerated, brushed-steel storage tower. Locking in the cellar’s exclusivity is it contents, whic…