A fountain pen is a popular writing instrument that uses a nib and a reservoir of ink to create smooth, flowing lines on paper. Unlike ballpoint pens, fountain pens rely on gravity and capillary action to draw ink from the reservoir to the nib, providing a unique writing experience that many enthusiasts cherish. Fountain pens come in various designs, materials, and nib sizes, allowing users to choose one that suits their personal style and writing preferences. They are often considered a symbol of elegance and sophistication, making them a favored choice for both everyday writing and special occasions.