Fountain pens are elegant and refined writing tools that use liquid ink to mark and write on paper. They consist of a thin tube, often made of high-quality metal or plastic, equipped with a metal nib, which contains a small channel for ink flow. Fountain pens may come with reusable ink reservoirs or replaceable ink cartridges, and the ink is transferred onto paper through capillary action and pressure exerted during writing. These pens are appreciated for the beauty and fluidity of their writing, as well as for their sophisticated and classic appearance. Fountain pens are primarily used in formal or business situations but are also cherished by calligraphy enthusiasts and those who appreciate high-quality writing instruments.