This 18-piece glass prep bowl set is crafted from transparent glass through a process of pressing and annealing. The clear material allows for easy visibility of the contents, and the bowls are stackable for convenient storage. They are perfect for holding chopped green onions, cilantro, salt, spices, dipping sauces, condiments, nuts, and other small ingredients during food preparation. They are also well-suited for organizing baking ingredients, serving side dishes, or holding table condiments. The 18-piece set allows for organized sorting and versatile use; the small-sized bowls are highly convenient for everyday cooking, family meals, or gatherings. Clean and dry the bowls after use before stacking them. Handle with care to avoid impacts or chipping; they are compact and do not take up much space when stored.