staple item

Translations
основной предмет
Milk is a staple item in most households.
Молоко является основным предметом в большинстве домохозяйств.
Definitions
A staple item refers to a basic or essential product that is regularly used and typically in constant demand, often forming the foundation of a supply or inventory.
Words
item

noun
предмет
staple

adjective
основной