SUNLU 3D Printer Filament Bundle, PLA Silk Rainbow Filament Multicolor, Fast Color Change Each 8 Meters, Individually Vacuum Packed, 250g Spool, 8 Rolls, 2kg Total, 6 Silk Rainbow+Light Gold+Silver

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.