DIY Water Fountains – Most cats love water. Many cats find themselves sipping water from the faucet. But what you can do is encourage your cat to drink by adding filtration to his or her bowl. Your pet will enjoy drinking aerated water just as much as he loves munching on fresh grass for better digestion and fresh breath. Most filtration units will run you about 20 bucks or so and the bowls are anywhere from 10 dollars to 20 dollars.