Material bucket holder: This holder integrates the temperature and humidity control unit directly into the main body of the bracket, while also enhancing its aesthetic design and structural reinforcement. The roller components feature strategically placed grooves for improved grip and anti-slip performance, and the bearings are seamlessly integrated into the rollers, making it easier to align and secure the material spool within the bracket’s locking mechanism during replacement. The material feed is smooth and effortless, and the entire assembly requires only a single hardware component—the bearing—specifically model 92900zz, measuring 10×22×7. When slicing and printing, it’s recommended to fill the horizontal support bars at 100% for optimal stability. This versatile bracket isn’t just ideal for use inside rice buckets; it can also be deployed directly as a standalone material holder, particularly for applications involving anti‑spill trays. Some materials may crack along the edges of their storage trays due to shipping damage, rendering them unusable with standard two‑roller brackets. However, this bracket design—which routes the material through the center of the tray via the rollers—eliminates the risk of material tray cracking, ensuring reliable and consistent material delivery.