For our trip in '08 I packed about 8 litre bottles of water in my checked bag, zip locked & stored in a soft sided cooler. Everything arrived safely & nothing leaked. Many, many years of travelling via motorcycle has resulted in streamlining our packing to the point where a week's worth of essentials fit into a tank bag and tail pack so there was plenty of extra room in our checked luggage

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I packed the water because it was our first trip and I wanted one less thing to worry about (it's pretty much all that I drink). I had no idea how accessible the Hess station was.