In general you want to get ceramic or metal food dishes. Plastic food dishes acquire microscopic scratches in which bacteria flourishes. You should wash the food dishes frequently, just as you do your own. Always supply fresh water with each meal.
If your dog has long hound ears, you should get the cone-shaped high dishes that help keep the ears out of the food and water. Otherwise, any dish will do fine for your dog. There are lots of cute dog dishes out there.
Some of the larger breeds should have their food dishes elevated to reduce strain on the neck and back. Many online retailers carry metal frames for dishes. You can also try wooden boxes. Another possibility is to obtain traffic cones and cut the tips off — food dishes then fit snugly on top.