I enjoy finding small gadgets with the camper/prepper in mind. This is a nifty shower head that would be easy to carry in your BOB or GHB. Liter bottles or the smaller ones are easy to find and some preppers store preps in liter bottles so many have the liter bottles on hand. The video makes it look easier then I think it would be but this is a great idea IMO especially if you have younger children. I know you can punch holes in the cap of a liter bottle but you can only poke so many and this shower head is like a mini shower. Simple Shower - Guaranteed to Get You Wet! This is available on the inventors web site or on Amazon - Amazon.com : Portable Camping Shower - Simple Shower : Portable Camping Shower Gear : Sports & Outdoors Because the inventor of the simple shower is located in Washington state, they know the wind storms that many of our monkeys are plagued with. Great review on the Simple shower here: Simple Portable Camping Shower Review
I think that is going to be very successful. Use it with sun-warmed bottles of water and I think it would make a great camp shower.
In Afghanistan I would just use a case of water left in the sun, take the caps off and dump the whole case over my self a few times. 1 case of 12 bottles at 500ml each were plenty.
I iron my own clothes. Costs a lot less. keep one of these in the Eurovan Camper couple cups of warm water - used this all the time in the field when I working for a Geo-exploration company and we stayed in the field for 3 or 4 days at a time.
I have not seen one of those in nearly half a century. They were sized to fit the opening of various sized bottles. I can tell you the results of shaking the coke bottle too hard while sprinkling that shirt ---