A potato ricer is a kitchen implement used to process potatoes (or other food) by forcing it through small holes, which are often not much wider than a grain of rice

Rice

Rice is the seed of the monocot plants Oryza sativa or Oryza glaberrima . As a cereal grain, it is the most important staple food for a large part of the world's human population, especially in East Asia, Southeast Asia, South Asia, the Middle East, and the West Indies...

. Mashed potato

Mashed potato

Mashed potato is made by mashing freshly boiled potatoes with a ricer, fork, potato masher, food mill, or whipping them with a hand beater. Dehydrated and frozen mashed potatoes are available in many places...

es is a food commonly made using this utensil. In technical terms, it works by a process of extrusion

Extrusion

Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed or drawn through a die of the desired cross-section...

. A potato ricer can also be used to squeeze excess water from sliced or grated potatoes.