A detailed technical patent diagram of a double bass fills the composition with intricate line work and labeled components rendered in black ink on white paper. The drawing captures both the instrument's full body and numerous close-up details of its mechanical parts, creating a dense, schematic mood that celebrates the bass as an engineering marvel as much as a musical object. 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.