A staple, in the context of essential items, refers to a basic product that is regularly used and necessary for daily life. Common examples include food items like rice, bread, and milk, which are fundamental to many diets around the world. These staples are often affordable and widely available, making them crucial for households. In addition to food, staples can also refer to essential goods in other categories, such as stationery items like paper and pens. These items are frequently needed for work or school, highlighting their importance in everyday activities. Overall, staples are foundational elements that support basic needs.