A technical patent diagram of football pants rendered in white linework against a black chalkboard ground, showing front and back views with detailed annotations of pockets, padding, and construction seams. The composition captures the precision and instructional clarity of vintage patent illustrations, executed with the hand-drawn quality of chalk on slate. 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.