RAMBERY Matte Rainbow 3D Printing Filament Fast Color Change, Multi-Color PLA Filament for Most FDM 3D Printer 1kg(2.2lbs), Matte Rainbow Blue-Green

Amazon-only brand specialising in rainbow and silk PLA filament. The catalog is small and tightly focused — fast color-change rainbow spools, silk rainbow variants, and glow-in-the-dark rainbow PLA. Sold primarily in 200g × 4 spool multi-packs rather than standard 1 kg spools.