I happen to like Nescafé Instant granules for normal drinking, so it's probably not coincidence that I also like their Cappuccino sachets. Obviously I'm not a coffee snob. The sachets include sugar, but I add another spoonful.

More importantly, they include a milk substitute that I find tolerable. I'd rather real milk, but I'm happy enough drinking this that it's worth keeping some in the house for when I run out of real milk. It probably happens less than once a month but means I can postpone a trip to the supermarket when it does.

The sachets become invaluable when walking and I don't want to lug real milk with me in a vacuum flask. I stockpile more than I need in case some disaster disrupts my milk supply line.

For me the other convenient hiking drink is Oxo. I can dissolve a beef Oxo cube in hot water and be happy without milk or sugar.