SUNLU CMYK Lithophane Matte PLA Filament 4KG, PLA Matte 3D Printer Filaments Bundle, Fast Matte Surface 3D Filament, 1KG Reusable Spool 4 Packs, Total 4 Colors, White+Magenta+Yellow+Cyan

Well-known as much for their S1/S2 filament dryers as for the filament itself. The material catalog — PLA, PETG, ABS, TPU, silk — is broad and frequently discounted on Amazon. Solid all-around option.