I just bought this mondo-huge bag of Livesaver mints. They are a lot harder than I remember them being. On my mission we had a bag that sat in the car. That way, we always had something on had to a) freshen the breath) and b) keep us awake during long meetings.
I think the long hours of sitting in the hot sun made the mints melt a little. They would just crumble in your mouth....in a good way.