Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very helpful for hand laundry

Great product with myriad uses. I found it very helpful for doing hand laundry in places where it was inconvenient to use a drain stopper. You put a little soap in the bag, add water and your clothes, and then agitate and let soak for as long as necessary. Rinse under running water and you're done. I don't think a standard Ziplock would have stood up to that treatment.