There are various options depending on your needs and wallet.
For a simple brew up then what about a metal Crusader mug and bottle?
https://www.raymears.com/Bushcraft_Product/86-BCB-NATO-Crusader-Cup/
For cooking then a MSR 775ml stainless pot is a good choice. The fact it clips shut is a good point. It's perfect for one person, maybe two, and you can keep all your brew kit and mess kit inside it to make use of the space:
http://www.cotswoldoutdoor.com/msr-stowaway-pot-775ml-d3322019
What I also like about the MSR is that you can use a bit of chain between the two clips and then suspend it over a fire if you want. Here's mine in use:
Or maybe a Crusader mess kit which is a similar concept to the MSR (or vice versa) but the Crusader mess kit doesn't shut as well but has the advantage that you can use the lid as a frying pan. As you can see, though, they're hard to get hold of now. To be honest, the MSR does the job better for just a couple of extra quid, unless using the lid as a frying pan is important.
https://www.amazon.co.uk/BCB-CN008-Crusader-Stainless-Steel/dp/B000TGOS0S
I team my MSR pot up with a titanium mug that slips beneath a nalgene bottle (so similar in set up to the Crusader mug/bottle but the titanium mug and nalgene bottle weigh the same as the crusader bottle on its own! Not including water, obviously). Used in conjunction with the MSR pot you can get your brew done and whilst that cools enough to drink you can cook your stew/noodles/whatever in the MSR. This is the one I have:
http://www.backpackinglight.co.uk/pots-pans-and-mugs/SC121.html
Here's what I mean about compactness - teamed up with a trangia and pocket stove. I'm sure it could be made lighter and smaller but this suits me for versatility, compactness and ease of use. This is my brew kit: