Parakeets like a good bath. If you don’t give them access to a bird bath in the cage, your parakeet may try to wash in the drinking water. This is a clear message from your parakeet to install a proper bath!
There are many types of bird bath available in stores and online, so choose one that fits your cage set up. For example, some baths clip to the cage door or the space where the food or water tray sits; others are more like walk-in showers; and the simplest ones (which you can easily improvise for yourself) are non-tipping shallow trays.
Yellow parakeet, yellow bath
The parakeet baths can be outside the cage, if that suits you better. A bowl of water placed on the floor is a parakeet magnet! Expect plenty of splashing, and choose a bowl that sits securely on the floor: if it tips or rocks, the bird will panic.