Being Canadian, my thoughts turn to icicles and how the concept works. You just break one off when you want one. So filling your ice bags and having them hanging from a stick/rod/hanger of any kind would allow them to freeze individually, like bagged icicles, and then you just break them off or cut them off one at a time to sell them. Would it work? No freakin' idea but it sure works great for icicles in Canada.
I am waiting excitedly for the next Ice Age so I can test out your theory mate! Mind you; that may be doomed to failure just like this lil venture, where the neighbour's missus has now taken to stalking the right of way path ambushing any of our customers into buying her ice instead! Welcome to the Philippines! ROFLMAO!!!
I told my wife of your neighbor's missus ambushing your customers. She said "that's filipino!" ROFLMAO TOO