Many of us have given up drinking water and other beverages from reusable plastic cups, and it's also a good idea to give your pets water from a non-porous container. Instead of plastic water bowls, consider stainless steel. Plastic deteriorates over time and gets both large and microscopic scratches. Even with frequent washing, these scratches can become a breeding ground for bacterial growth. Plus, as plastic ages, it dissolves slowly into the water, which ends up in your pet's digestive system. Another bonus of stainless steel: It's recyclable in your curbside recycling.