You can't have everything with you, so I now carry the aforementioned small spray bottle of hydrogen peroxide, a few betadine swabs and a few quart size zip lock bags. I fill the bag with water, clip one bottom corner (small clip) and squeeze the bag to get an effective stream to flush the wound. This whole kit weighs little and takes up a very small space in my FAK.
So, what's a good brand of saline? I went to the local pharmacy recently to get some saline after reading about it here, but all of the products I saw had a whole raft of chemicals in them. I'm thinking that spraying chemicals into a wound may not be the best idea. I couldn't find anthing that was just H
20 and NaCl.