I make my own dishwashing cloths.
Thoroughly rinse out clean unused baby wipes ( I use a name brand as they tend to be thicker and more sturdy), squeeze out any excess water and add a quarter size drop of your favorite dishwashing liquid. Then allow them to dry completely. Store them in a travel wipes container or ziploc bag.
I use them to wash sippy cups, baby bottles, pacifiers, disposable utensils, resort mugs, etc.They work everywhere, I use them whenever I go out with DD1 and not just on vacation!
**Make sure you let them dry completely before you store them though, I didn't do that once and they got that nasty, musty, rotten, smell!
Also, for those of us who bring regular size bottles of shampoo, conditioner, etc. in checked luggage on the plane: leave at least an inch of space between the top of the liquid and the top of the bottle and then double bag. The air pressure in the plane messes with the bottles causing the liquid to expand and explode.
You can also make your own dryer sheets:
Soak a dry wash cloth in liquid softener, squeeze out any excess, allow to dry completely. Toss them in the dryer as you would a normal dryer sheet. You can even use them multiple times!