This visualization displays the expiration of stock items as an interactive treemap, showing hierarchical relationships across product levels with rectangle sizes scaled by a chosen measure such as budget. Users can zoom into different levels, with each level assigned its own color scale to encode a secondary metric like remaining days. Built with d3.v4, the example uses `d3.hierarchy`, `d3.treemap`, and `d3.nest` to structure the data, while SVG elements and animations support the zoom transitions. Hovering reveals tooltips with detailed information about each item.