I actually wasn’t aware of the natural rubber vulnerability to e-coli… And the spigot will be placed in a highly humid environment. So I guess back to the drawing board.

Thank you for your very comprehensive response. I am currently trying to replace the outer silicone gaskets with cork, with mixed results, which is why I hoped that natural rubber may do the trick. I also did see that the inner O-rings were made of EPDM, so I hoped that those could be replaced with something better for the environment.

Or it’s not really worth it financially, I suppose. I mean, my initial idea was to find an all-metal pump dispenser. There are none and I think they would be both safe and legal?

I suppose like it did before news orgs were a thing. So, like how it was about 200+ years ago?