@wonka the surface pattern strongly suggests FDM. But as mentioned in the alt text, this image is an internet find and not from @BlippyTheWonderSlug

I personally printed stuff for food contact and I really prefer FDM with PETG, since there are food safe PETG filaments. Compared to SLA resins with hazard statements on the packaging…

And bacteria growth is a problem with every surface if the environment conditions are suitable for it to grow.
Just clean and store them in a dry place