After all that fun in the sun, sand and surf, you are bound to get thirsty. Also, keep in mind it is very important that one stays well hydrated. For such times there is nothing like having chilled drinks or water. This is especially true for kids who always seem to like something iced. Chances are by midday the drinks you have stored in the portable ice box would have lost their cool. What you can do is, the day before put your drinks or water in a big plastic bottle and then pop it into the freezer. Take it out when you go and though it will be frozen solid at the time, by midday it should be more or less back to its liquid form and still cold too.