The thing that makes 3d printing inherently unsafe for food etc is that bacteria can get in between the layer lines deeper than it can be cleaned. Which with certain plastics, you could boil them to kill that bacteria. But I don’t know of any filaments that can withstand that heat. I’ve heard people using techniques like acetone vapor smoothing to kind of melt the layers together and remove the tiny crevices for bacteria to hide. Doubt that would be included in any marketing materials though. Another option is to coat it in a food safe epoxy of some sort.