The "strainer" of a manual hand press juicer is a crucial component that ensures the final juice is clean, smooth, and free from undesirable pulp and seeds. It acts as a filter, allowing liquid to pass through while retaining solid waste. The strainer is typically a perforated cup or cone-shaped insert that sits directly over the juice collection area, and beneath the fruit as it's being pressed. Its design is characterized by numerous small holes, slots, or a fine mesh pattern.