The Snow Peak website, Japan, not USA, has some of the most beautiful, tiny, cast iron dutch ovens, which if my memory serves me right, hold about 450ml, a gnat's whisker under a pint.
Had my laptop not died and killed 20 months of research data, files and images, I'd be able to post all the relevant info.
If you cant find 'em (there's a few) I'll have a look when I've had some sleep.
I was going to buy one before I discovered an American made titanium kettle/dutch oven which is so much lighter (I'll be carrying it!).