SUNLU CMYK Lithophane PLA+2.0 Filament Bundle, 4KG Upgrade PLA+ Filament, Tougher and Stronger, Dimensional Accuracy +/-, 1KG per Spool, 4 Packs, 4KG Total, 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.