Technical drawings of fishing rod components and mechanisms fill this chalkboard-style composition, rendered in white lines against a dark charcoal ground. The patent illustration captures multiple views and cross-sections with the precision of an engineer's hand, creating a layered, instructional aesthetic that celebrates the ingenuity of angling equipment artwork. 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.