Well for one: most of the things listed already have a solution:
Food? Glassware and Metal containers. Or Even reusable single type plastic containers, like a tupperware.
Sterile medical supplies already are packed in a paper bag. The ones that are in plastic actually aren't.
Medicine can also be packed into glass and metal containers.
Beverages can be put in cans or Reusable Glass bottles or you simply drink tap water. (I know in some countries that's not safe but it should be)
And honestly your cafeteria is the most ridiculous example. Get a dishwasher and use real cutlery. Or bring your own cutlery from home. (Is it actually a cafeteria or just a glorified break room?)
Die Bahn gehört 100% dem Bund