They are five Hobbits, all joined together by a sense of adventure and their desire to eat. Together they will see many things and eat many foods.
First it's Breakfast. Then Second Breakfast. Followed by Elevensies and Luncheon. Shortly after is Afternoon Tea. And the day would not be complete without Dinner AND Supper.
It's just so unfortunate others don't know about all of these fine opportunities to eat. Especially Second Breakfast. It's the second most important meal of the day, you know?