LIMITED QUANTITIES! 4-1/2″ round ceramic coaster with 1/2″ thick square cork backing. White variation has limited quantities! Try our glow-in-the-dark option or make your imprint sparkle with a reflective gold imprint! Imprinted with PMS color matching/spot color process and organic polymer ink. Prop 65 compliant: lead-free and cadmium-free. Our precise imprinting is 4x better than industry standard. Other dishwasher resistant options available upon request.