If you're into 3D printing and love vibrant, eye-catching colors, the YOUSU 3D Printer Filament Galaxy PLA Filament bundle is worth considering. This pack includes four unique colors: Glitter Galaxy Black, Chameleon Blue, Glow in the Dark Green Starry, and Glitter Gold. Each spool is 250g, making it a great sampler for testing different shades without committing to a full kilogram.

The standout feature here is undoubtedly the Glow in the Dark Green Starry filament. Under bright or UV light, it emits a cool glow—perfect for fun projects like nightlight decorations or Halloween props. However, be prepared to tweak your printer settings. I found that using a 0.6mm nozzle and keeping layer thickness above 0.2mm worked best to avoid clogs.

Printing with the glitter filaments was surprisingly smooth once I dialed in the right temperature (around 190–205°C). The sparkle effect adds a premium touch to prints, and the layer adhesion is solid—no warping or delamination issues. That said, the Chameleon Blue gave me some headaches; it clogged my nozzle multiple times until I switched to a larger nozzle size.

One downside? The filament can be brittle straight out of the bag, especially the color-shifting varieties. Drying it beforehand helped, but it’s an extra step you shouldn’t skip. Also, while the colors look stunning on the spool, some shades (like the Chameleon Blue) don’t translate as vividly onto prints.

Overall, this bundle is a mixed bag—great for experimentation but requires patience and some trial-and-error with settings. If you’re after glittery or glow-in-the-dark effects and don’t mind troubleshooting, it’s a fun addition to your filament collection.