5 stars. The Coconut Truck shows up next to RIA HQ and Campus on sunny days. For three dollars, they will give you a "coco helado" (chilled coconut). Helpfully, they machete the top off the coconut and give you a straw to drink the coconut's water.
But wait, there's more.
If you bring the coconut back to the coconut truck, they will hack it up for you and peel off the coconut's meat. They put the meat in a plastic bag with hot sauce, lime, and salt.
This, my friends, is $3 well spent.