If you want to go inexpensive, mate a 32 oz gatoraide with a 5oz gsi stainless cup, add a 64 oz gatoraide for extra. I also like snow peak titanium cookware. Those gatoraide bottles are tough, great caps, and 2 and 3 oz, or close.
Get a scale. Start weighing things. Titanium or stainless cups/pots can be used with a bunch of different stoves, or wood, and you can't make food in a canteen.
Get a scale. Start weighing things. Titanium or stainless cups/pots can be used with a bunch of different stoves, or wood, and you can't make food in a canteen.