A fountain pen is a writing instrument that holds liquid ink inside its body and feeds it smoothly to the paper through a metal tip called a nib. Unlike a ballpoint pen, which uses thick, paste-like ink and a tiny rolling ball, a fountain pen flows ink directly onto the page, creating lines that can vary in thickness depending on how you hold it and the angle of the nib.

Fountain pens were invented in the 1880s and quickly became the standard writing tool for anyone who needed to write more than a few sentences. Before fountain pens, people had to keep dipping their pens into bottles of ink every few words, which was messy and slow. The fountain pen's internal reservoir meant you could write for pages before refilling.

Today, most people use ballpoint pens or type on computers, but many writers, artists, and students still prefer fountain pens. The ink flows more smoothly than a ballpoint, which can make writing feel more effortless, especially during long writing sessions. Some people find that using a fountain pen improves their handwriting because the pen responds to subtle changes in angle and speed. Others simply enjoy the ritual of filling a pen with ink and the satisfying scratch of nib on paper.