Image of the Week: Bottle of Dust and Light This photo presents a tangible manifestation of a 3D caustic surface. This effect was achieved by collimating light rays from lasers of two different colors and directing them onto an optical device that was fabricated using additive manufacturing, featuring an interface with an elliptical profile specifically designed for this purpose. [2025 #OPNPhotoContest Third Place] — Osvaldo Ponce-Hernández and Maximino Avendaño-Alejo, Universidad Nacional Autónoma de México, Mexico City, Mexico *Link in Bio