First aid is so important to know. Many years ago, soon after reading about the Heimlich maneuver for removing something from a choking person's throat, I had to do it on my youngest child when an ice cube got caught. My husband's cousin had to do CPR on her daughter around the same time, also because of an ice cube.
Yes, ice cubes may be considered as a great zero sugar cooler for the kids (and others) but it can also endanger life if it gets stuck in the throat. People choke on ice cubes. So please beware.