Drinks
Suggestions
Water, with aqua tabs if out of a stream, river or lake
Tea
Coffee
Milo
Hot chocolate
Instant everything unless you want to carry a plunger.
If you want to carry a plunger let Mr Greenwood know and you will have a friend for life :)
Powdered milk, long-life milk, condensed milk in a tube
Other possibilities
Raro or powdered energy drinks to add to water