A cross-section of brown agate reveals concentric bands of warm tan, cream, and charcoal that radiate outward from a sparkling crystal-lined center cavity against a dark ground. Gold foil accents trace the geometric layers, creating luminous linear patterns that emphasize the stone's natural formations and mineral deposits. 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.