Polymaker Panchroma Purple Color Changing PLA, 1KG, Glitter Starlight Nebula 3D Printer Filament, Hides Layer Lines, Easy to Print, Tangle Free, AMS Compatible, Works with Most FDM Printers

The most engineering-minded consumer brand in this space. Polylite is their everyday PLA, PolyMax adds impact resistance, and PolyWood nails the timber look. They publish data sheets and actually explain what's in their formulations.