They work best if you fill the balloon with something other than water
. My favorites are chocolate pudding or grape jello. You can use a funnel and a section of hose for this. Kind of like a reverse beer
bong, where you fill the hose with the funnel on one end and then remove the funnel and blow the mix into a balloon on the end of the hose. Refrigerate and then put in a cooler on board.Once the balloon is loaded into the launcher, slice the balloon with a razor blade. It will pop off , leaving a balloon shaped projectile that will splatter upon impact and will not litter the water with balloon debris.