Carry a few Taylors of Harrogate coffee bags, the Java coffee versions, are guaranteed to blow anyone's mind, after a long and tiring jaunt.
That flask of boiling water, a splash of milk, and bobs your uncle.
I had one two weeks ago, whilst sitting quietly alone on the summit of Diffwys.
My Jetboil was on the go, favourite mug, and wow, a cuppa to equal anything from Costa or Starbucks, at a fraction of the cost, in surroundings almost as good as the cuppa