I waited a long time to try this because it seemed a bit chancy. I was told many times not to eat raw vegetables and not to drink the water (including ice). Sugar cane juice carts use both.
Raw sugar cane is run through a gas powered mangle/juicer...
...the canes are run through 5 or 6 times to squeeze all the juice out which drains into a pot of ice to cool.
The ice and the fibers of the sugar cane are strained out, and the result is amazing. After I finally tried it once, I got it every time I saw one, and they are everywhere.