Scrubba Wash Bag - Patented Washboard-in-a-Bag™ Portable Travel Washing Machine for Camping, Backpacking, Cruises & Hotels - Pack Light, Wash Clothes Anywhere in Minutes (5 oz)

My friend swears by her portable washing bag. Then just use whatever detergent you like, although I think she really likes a bar laundry soap I can’t remember the name of, but like Fels-Naptha, that she just shaves little bits off. As for if you want to buy products here, I like Tesco Bio powder, it’s cheap and the box isn’t massive, or Ariel liquids, pods or powders. But Ariel is very pungent, and I can’t think off the top of my head what sort of sizes you’ll find.