Here is an awesome trick I picked up for making finely crushed ice for daiquiri’s, snow cones, etc.
Save your plastic milk cartons. Thoroughly rinse out carton, fill with water and store in freezer. When ready for finely crushed ice simply remove from freezer, find a solid concrete sidewalk or patio & slam it against the cement on all four sides until it quits going “Crack” & starts to go “Thunk”.
Open top and pour out your crushed ice. If you only need a little, replace cap & return it to the freezer. This is great for when you have unexpected guests or a bunch of kids to entertain. No need to waste money on an ice crusher.