The primary ingredient in cider is apples. Cider is made by fermenting the juice extracted from fresh apples. The process typically involves juicing the apples, which can be a blend of sweet and tart varieties, and then adding yeast to initiate fermentation. The fermentation process can take several weeks to months, resulting in a beverage that ranges from sweet to dry, depending on the apple varieties used and fermentation methods. Cider is a popular drink in many cultures, particularly in regions known for apple production, and can be still or sparkling.