In 1963, the Japanese company Ohto introduced the first liquid-ink rollerball pen, combining the convenience of a ballpoint with the smooth, wet-ink feel of a fountain pen. The rollerball used a water-based ink and a ball-and-socket mechanism, offering a writing experience that was both effortless and flowing. This invention created a new category of writing instrument that became immensely popular.

The rollerball pen provided writers, including poets, with a tool that combined the best qualities of the fountain and ballpoint pens: the smooth flow of liquid ink with the ease and reliability of a ballpoint. This made the physical act of writing more pleasurable and less fatiguing, allowing for longer periods of creative work. The rollerball's popularity is a testament to the ongoing quest for the perfect writing instrument, a quest that shapes how poetry is composed and experienced.