Viagra, according to :

Like most of the major Champagne houses, Taittinger’s sales have been badly affected by the economic downturn, with volumes down 10% during 2009. But Taittinger said he expected sales to rise 10-20% this year, aided by 40% year-on-year growth in China. Champagne’s only competitor? ‘Viagra’. 

In all honesty, I buy so much champagne, I thought for sure I was keeping the market afloat.  Or abubble.