The item that people have been actively using in their daily lives for the longest time is likely the knife. Knives have been essential tools for various purposes, including food preparation, hunting, and crafting, throughout human history. They were used in prehistoric times and have continued to evolve and remain indispensable in modern daily life.In the medieval period, knives were commonly used as both eating utensils and everyday tools. They were typically carried on a person's belt, making them readily accessible for various tasks. This longstanding use of knives highlights their enduring importance in daily life across different cultures and eras.Other items, such as combs, candles, and chamber pots, also have a long history of use, but knives stand out due to their versatility and continuous presence in human activities from ancient times to the present day.