A technical patent drawing from 1928 displays baseball equipment in meticulous black line work against a clean white ground, with a bat, ball, and detailed cross-sectional diagrams of the ball's interior construction arranged in a methodical grid. The composition carries the instructional clarity of early-twentieth-century patent documentation, rendered in precise pen strokes that emphasize function and engineering innovation over decoration. Built from double-wall stainless steel and made to order, holding 20 ounces with a snap-on lid, a standard-cup-holder fit, and wraparound artwork. Your commute carrying original art instead of another branded tumbler.