What is the name of your project?
Fuchsia netstack3

Please provide a link to your project (GitHub repository, crates.io page, etc).
https://cs.opensource.google/fuchsia/fuchsia/+/main:src/connectivity/

What features would you like from zerocopy?
It might be useful to implement NoCell, IntoBytes and possibly other traits for std::convert::Infallible so that it can be used e.g. in associated types. This would improve how specific invariants are enforced and would allow use Infallible instead of () or a custom defined type with the same behavior of Infallible.