One mandatory item for the kit?

In the event there's no 'join me for a meal' offer from a local inhabitant, I'd have thought 100kilos of excess luggage aught to be more than enough to be self sufficient....and some.

But you tell us. If you were to carry just one item in your kit to be sure you got fed and were well rested for the next day of windsurf touring, what would you take?

(pic: mat & adrian ready for airport drop off)

mtj