Ballpoint pens are used as a writing instrument that replaced quill pens and fountain pens during the mid-nineteenth century. Most ballpoint pens are relatively inexpensive thanks to their popularity and the materials used. Undeniably one of the world's most treasured inventions, the ballpoint pen is used by countless people around the globe each day. We use it so often that we hardly even think twice about it; it is an innate item in our daily lives.