Durable clear acrylic construction. Transparent, robust, lightweight, stable and nontoxic. Designed to last a long time and without a plastic or chemical odor. Easy to install and versatile mounting. There are two hooks that work in two directions. Attach the hooks in two positions and you can hang the dish inside or outside the cage. Simple to use. Supports bird care. Helps provide good food for your bird and contributes to keeping your bird clean and healthy. Size options and suitability. Suitable for small to medium parrots. S size is 5.1 x 5.1 x 4.3 inches. M size is 6.3 x 6.3 x 6.3 inches. Practical use scenarios Inside cage use: mount inside the cage to give your bird convenient access to water and food, promoting regular bathing and hydration. Outside cage use: hang on the outside of the cage to keep the interior cleaner while still providing access for your bird. Easy maintenance: the dual hook design allows quick repositioning and simple removal for refilling and cleaning.