Three technical drawings of a baseball helmet appear in white line-work against a charcoal chalkboard background, showing front, side, and rear views with precise patent annotations. The composition captures the functional geometry of the protective gear with the austere clarity of vintage industrial documentation. 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.