No need to air (or wear) your dirty laundry on the road — not when you travel with the Scrubba Wash Bag, a portable laundry system built in a knapsack. Just stuff your soiled clothes in the Scrubba, add a little soap and water, and voilà: With a few squeezes, your threads are washing-machine clean. $65, or $105 with clothesline and drying kit.