On careful reflection, I don't think a crisp is a value object – at least, not in the playground scenario I was dealing with - because I'd argue that every crisp has a distinct identity and lifecycle. Don't believe me? Here, have some crisps. No, it's OK, go on, have the whole bag... <crunch, crunch, crunch> Now that you're happily tucking into your crisps - guess what? Colin licked one of those crisps earlier when you weren't looking.