If I produce a glass with standard resin, that releases substances that create problems for water?
Standard resins aren’t approved for food contact so I wouldn’t recommend it, certainly not as a commercial product. That being said, for prototyping you should be able to coat the parts with an FDA approved lacquer of some kind.
In addition to what was mentioned above you could produce one using one of the biocompatible dental resins. It would be one expensive water glass…
yes probably too much
Perhaps there is a way to make a spray of any material suitable for contact with food products