After the grapes are sorted, they are ready to be de-stemmed and crushed. For many years, men and women did this manually by stomping the grapes with their feet. Nowadays, most wine makers perform this mechanically. Mechanical presses stomp or trod the grapes into what is called must. Must is simply freshly pressed grape juice that contains the skins, seeds, and solids. Mechanical pressing has brought tremendous sanitary gain as well as increased the longevity and quality of the wine.