[Swamp_Hiker]

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I'd recommend US issue canteen cups with canteens in them. They are light, indestructible, and take up negligible space when stored on a canteen. They are perfect for boiling water and single-serving meals. (hint: get some tinfoil to be a lid)
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x's 2

As far as how many people.. my people each carry their own.. including my kids. A 1qt. canteen, cup, and cover is standard issue at my house