Laundry Tip: Kitchen towels are made to soak up spills! Of course, you can just drape them as decor on your bar, but chances are, you'll need to actually use them.
If you can, let them air dry a bit before throwing in the laundry. Wash and dry as normal. Low heat on the dryer works best, and taking them out of the dryer promptly will help avoid some of the wrinkliness - they are cotton!
If you would like to iron them, no problem - simply iron on the back side, away from the vinyl used for the design.