I usually just use a small Nalgene bottle I bought at the camping store. It came as a set with several other travel jars, etc, and it was on sale. I think I paid $9 for the entire set. I find the bottles seal really tightly and will hold enough to do a week's worth of handwash in the sink or two small loads in the machine. I use Woolite Dark on my clothes, and I've never seen it in a travel size. I used to just get the small Woolite packets, but I had one break in my luggage. ick, what a mess. Thankfully it was in the ziploc with my laundry stuff, but I had to throw out my dryer sheets and rinse out the travel clothesline well before I could use it. The Nalgene bottle just seems safer to me, and cheaper, too.