We've seen some bowls made for ferrets that ours could not fit their heads into. It should be made strong enough so that it can't be chewed apart or shattered. Some are made of brittle plastics than can be easily broken by a strong male ferret. It should be made of material that can be washed repeatedly. Just like the water bottles, food bowls must be washed with soap and water at least every 2-3 days and be disinfected with a mild water and bleach solution at least once a week.
Most ferrets love to dig and the food bowl makes a great place to practice their mess-making skills.
Other Essentials Bitter Apple Bitter Apple is used to help nip-train or keep ferrets from chewing those things they should not be. It's not harmful to the ferret, but it is rather unpleasant. With baby ferrets it can be used in small amounts on your fingers to train them not to nip you. Older ferrets may want to play with electrical cords or things they may be dangerous to them. A light coating of Bitter Apple will keep them from these things.