Vintage patent diagrams for basketball equipment fill a black ground with white line-drawn technical illustrations, including hoop assemblies, ball cross-sections, nets, and court layouts rendered in the precise, annotated style of early 20th-century patent documentation. The composition arranges multiple views and components across the surface with small text labels and patent dates, creating a dense, educational quality that celebrates the sport's mechanical ingenuity. Sewn from a durable canvas-like exterior with a soft lining and made to order, in three sizes up to one that fits a tablet. A catchall for toiletries, art supplies, or small electronics, carrying an independent artist's work instead of a plain zip bag.