Here are the great features of our Lixit Water Bottles: * Water stays fresh, clean and sanitary in the Lixit Water Bottles. Durable, thick wall glass bottle (Dishwasher safe). * Fits most cages * Easy to install * Quick-release bottle holder • One-piece tube cap with ultra vacuum seal. * US stainlees steel Ball-Point™ tube and mounting hardware * Non-Toxic, USDA approved, rubber stopper * All components can be sterilized * No springs for your parrot to get trapped in!