JAYO Silk Dual & Tri Color PLA Filament 10 Pack, Shiny Multicolor 3D Printer Filament Bundle, Blue-Green-Purple, Red-Yellow-Green & More, 1.1kg Spool Each, Compatible with Most FDM Printers

Multi-pack bundles are the point — buying 4 or 10 spools at once brings the per-kg cost down sharply compared to individual purchases. Good for anyone running the same color through a lot of prints and watching their material budget.