The Timeless black steel & glass fillings hourglass by CTRLZAK offers a modern reinterpretation of the classic sand clock, using refined iron fillings instead of sand. The iron particles flow between two glass compartments, visually marking the passage of time while forming a unique crystalline structure within the vial, combining functionality with sculptural elegance. This decorative sculpture is crafted with a sleek black steel frame, highlighting the movement of the iron fillings in a contemporary design.