一次性嘅筆主要係由塑膠整嘅，啲墨用嗮就成枝筆唔用得，可更換筆芯嘅筆係金屬或塑膠整，但佢質量同成本會比一次性嘅筆高。The refill replaces the entire internal ink reservoir and ball point unit rather than actually refilling it with ink, as it takes special high-speed centrifugation to properly fill a ball point resevoir with the viscous ink.[1]