The drink being described is an Italian brandy that is made from the leftover pomace of grapes, including the skins, pips, and other solids. This type of brandy is known as a marc brandy or grappa, and is a popular drink in Italy.
Grappa is a potent Italian brandy that is made by distilling the remains of grapes after they have been pressed for wine. It has a clear color and a strong, fruity flavor that can range from delicate to intense depending on the type of grapes used and the distillation process. Grappa is typically served as a digestif after meals, and it is often paired with espresso or other strong coffee. It can also be used in cooking and baking to add flavor to desserts and sauces.