I would say.......well here is an off the wall idea.
get a plate, and drop small bits of water all over, not making large pools of water. then freeze it. then break the small frozen peices of ice of the tray,and you have frozen ice peices.
well depending if you're going to use it for personal use, i would crush it with my teeth possibly ... never tried but if i had to i would, and not like putting it in my mouth and sucking on it, getting my saliva over the pieces, but like just using your mouth as crusher, like you know what i'm saying?
But like if you're going distribute w/e it is to others, idt they would enjoy that very much haha...