Plastic bowls come in different colours, they are light, durable and good value for money, but they are not suitable for dogs that tend to chew their food bowls, as they could swallow pieces that break off. With dogs like that, your best options are stainless steel, ceramic or porcelain bowls, which are also easier to keep clean.
When it comes to breeds, small, shallow bowls are more appropriate for small breeds. Larger breeds prefer deep, wide bowls. In addition, large breeds are tall at the shoulder, so raising the food and water bowls off the floor is strongly recommended. This is mainly due to their position when eating or drinking. Medical research has shown that such dogs should not be lowering their heads while they eat or drink water, because it leads to their heads being below their stomachs, which interferes with both ingestion and digestion. Moreover, the growth and development of their skeletal system and joints are so sensitive that they would benefit from making it easier for the dogs to eat and drink water. This also reduces the probability of the bowl being tipped over and therefore contributes to the hygiene of the dog’s surroundings.
In any case, maintain good hygiene of your dog’s food and water bowls, and make sure it always has fresh water to drink.