You're off to a great start. If you feel like you're getting stuck, be sure to listen to others' ideas. Look for the quietest person in the group. They may have a small voice, but big ideas.
Solve this like you would a "sudoku" puzzle. Instead of numbers, use letters. Each row, column, and bolded region needs each of the unique letters you see.
Notice the circles on the cup sleeve. What utensil that comes with your lunchbox would be helpful here?
Use the logos to line up the cup sleeve with the filled in grid.