YOUSU Tri Color PLA 3D Printer Filament, Coextrusion Rainbow PLA Filament with Silk PLA Pink-Blue-Green, Multi Color 3D Printing Filament +/-, 1kg/2.2lbs
Chinese manufacturer (Guangzhou YOUSU 3D Technology) specialising in co-extrusion silk and multi-colour PLA filaments. Sells on Amazon under the YOUSU brand.