Originally Posted by
Jeannietx
I also have a collapsing bucket that takes up no room and works really well when you have a too tiny sink.
^
It also frees up the too tiny sink from laundry while it is soaking.
I bring this travel sink
http://www.seatosummit.com/product/?...=0&o2=0&o3=193 
I like that it has a large opening for faster air drying. It is also shallow and wide enough for an impromptu foot soak with a wet towel.
Some alternatives are 2 gallon ziplock, dry bag, or scrubba dry bag washing gadget hybrid. Scrubba is also making a backpack
https://www.indiegogo.com/projects/s...daypack#/story
Ultrasil travel sink = 1.7 oz. Scrubba = 5 oz.