What should you pack for a day at Rio’s beaches? Nothing. Do like the locals do and get whatever you need from the vendors who sell everything from beer and hot sandwiches to inflatable kiddie pools and coloring books. As they patrol the shores, vendors twirl umbrellas weighed down with bathing suit tops, juggle inflatable balls, and shake castanets while declaring their wares. None are overly aggressive, and they’re quick to call another hawker over if they don’t have the exact sarong pattern or hat shape you are after. Have fun, and bargain a little. You’re likely to save a few reals with little effort.