A vintage star chart rendered in deep navy blue and white presents the constellations in precise geometric detail, with delicate lines mapping the celestial sphere across concentric circles and coordinate grids. The classical astronomical illustration combines the rigor of scientific cartography with the timeless appeal of early 20th-century astronomical documentation, its faded patina suggesting centuries of careful study. 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.