Politely friends would always ask if I want anything before they go on their holiday. Yes, I want them to have a good trip. Meaning unwind and think of nothing but absorbing the sights sounds and tickle their palates with all those delectable morsels.
When a friend of mine went trekking in Tibet I couldn't help but asked for a pebble from the top of the world. A place I might not have the opportunity to visit. My deduction is: that would be the only authentic local produce(then again I could be wrong) Have to admit I did ask for pebbles not rocks.
Now my Tibetan rocks decorate my fish pond.