Dishwasher cutlery baskets are typically designed to sit on the bottom tray of your dishwasher. They normally have several sections for you to fill with cutlery. They do however take up a fair bit of room in your tray which limits the space for plates. Cutlery trays normally sit at the very top of the dishwasher allowing you to lay out your cutlery individually without compromising on your crockery space. You can buy models with flexible trays too.