HARI Lock & Crock Bowls for birds offer many great advantages. Made of extra-thick, chew-resistant plastic, the heavy-duty bowls are durable, easy to clean, and top rack dishwasher safe. The crock-style dishes can attach easily to most cage wire sizes and fit vertical or horizontal cage wiring. They are an excellent space-saving alternative to freestanding dishes. Once installed, they will not twist, turn, or tip, eliminating messy food or water spills. The bowls can easily be detached for filling or cleaning, simply by sliding the locking device and lifting the dish.