Water is the single most important thing you can provide for birds and other wildlife. A source of unfrozen water in the harshest part of winter or the driest parts of summer can be the difference in life or death for some animals. Like all of our products we try to carry only those that are both practical and durable. Birds need shallow water because they not only need to drink, they have to bath to keep their feathers healthy. Some baths have a heating device built into their bowl while others can utilize a de-icer.