Water tank ，Compatible for LIECTROUX C30B XR500, Robot Vacuum Cleaner Convenient Lid and Water Filling: Flip-top design with a wide water inlet for easy filling without spills. Even the elderly and children can operate it easily, making daily use more worry-free Full Cavity Waterproof Sealing: Integrated sealing process ensures tight seams in the water tank, preventing leaks during use, protecting internal vacuum components, and extending the lifespan Lightweight Material Construction: Made from selected lightweight materials, the water tank is overall lightweight, adding no extra burden when holding the vacuum, allowing effortless cleaning for long periods Anti-Backflow and Spill Protection: Built-in anti-backflow baffle design prevents water from spilling even when tilting the vacuum during cleaning, allowing free movement without having to keep the device perfectly level