A technical patent drawing from 1936 displays various golf club heads and faces rendered in white linework against a dark charcoal ground, each illustration labeled with figure numbers and cross-sections. The composition arranges the clubs in a grid-like progression, capturing the mechanical precision and artwork evolution of golfing equipment with the austere clarity of vintage patent 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.