This is a 3D-printed color swatch model specifically designed for rapid testing of filament materials and for clearing out residual filament from the print bed. Inspired by an exploration of the aesthetic qualities of filament textures, the model features built-in streamlined wave patterns and concentric gradient infill, which not only vividly showcase the true colors of the filament but also clearly highlight layering details and light-and-shadow refraction effects. With extremely low filament consumption and short print times, it is ideal for emptying leftover filament from the printer before changing materials—and can be printed effortlessly without supports. The hanging hole at the top left makes it both practical and versatile, allowing it to double as a keychain or backpack accessory, making it a perfect solution for repurposing waste material while balancing functionality with visual appeal.