This could actually be a really fun way to respond to the Corporal Works of Mercy “Give Drink to the Thirsty.”  Gather up as many bottled waters as you can (the more the better) and go somewhere in town and give them away randomly to people.  You could maybe even use it as a mini-promo for the parish by putting labels on the waters with Mass times or Scripture.  Or if you want to keep it very simple, just write “you looked thirsty – Mathew 25:35.”