Two elongated baseball bats dominate the center of this technical patent drawing rendered in white linework against a dark charcoal ground, with detailed cross-sectional views and end-grain diagrams arranged to the right. The composition captures the precise, methodical language of early industrial artwork, using the austere palette and formal layout of vintage patent documentation to elevate a simple sporting tool into something worthy of scientific study. 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.