Perry a group of esters that affords them their prominent pear aroma. Another important attribute of perry pears that distinguishes them from cider apples is their relatively higher content ratio of sorbitol to other sugars, such as fructose. Because sorbitol is not readily fermented by yeast, it is not converted to ethanol, and perry therefore tends to have more residual sugar than cider produced from the fermentation of apples. In addition to producing a sweeter beverage, sorbitol also contributes to increased body and a softer mouthfeel in the finished perry. Compared to apples, pear pressing is made more difficult by the
Cider bottles with an alcohol content comparable to beer. "Sidra" was, due to the expense of imported Champagne, sometimes used as a substitute for New Year's Eve toasts in Mexico, as it is also a sweet, fruity drink. However, now the practice is to drink cider on Christmas Eve, celebrated with the family, and Champagne on New Year's celebrated with friends. Cider beverages form a very small share of the Mexican alcoholic beverage market, with the figures for 2009 volume sales amounting to only 3.8 million litres. In the United States, the definition of "cider" is usually broader than in Europe