A lemon squeezer is a kitchen tool designed for efficiently extracting juice from lemons and other citrus fruits. It typically consists of two hinged, concave bowls or cups with ridges or grooves on the inside. To use it, you place a halved lemon (or other citrus fruit) cut-side down into one of the bowls and then press the handles together. The ridges on the inside of the bowls help to extract the juice while filtering out seeds and pulp. Lemon squeezers are available in various materials, including metal (such as stainless steel or aluminum) and plastic. They provide a quick and effective way to extract fresh lemon juice for use in cooking, baking, or making beverages like lemonade.