Review on Lightload Towels: Portable, Quick Dry Compressed Towels for Travel, Survival and More - 50 Pack Gift Display by Peter Alradwan

I carry a pair in my backpack and pocket all the time. They take up almost no space and weigh almost nothing. Any fabric will do. They are great for many things. Wipe and clean things (possibly also buttocks), check. cooling cloth. Check. In any case, use your imagination. I also have a couple with a dining set. And you can reuse them too, although they're inexpensive enough to be thrown away. Just make sure you label your rag. ;P