There have been many incidences where my water bottle has come to rescue for other people. The latest one was when I was coming back from airport in the airport shuttle bus, the youth sitting next to me dozed off and woke up all of a sudden coughing and choking. Good that I carry a small sized tumbler in my purse. I poured water and gave him..he felt much better. We should have water with us as such emergency may arise anytime.