Hi,
Sounds like you have the basics. I use a thermos and pack leftovers if I have them but mostly I do foods that can stay cold. Here are just a few examples:
Grapes with laughing cow cheese wedges
Pretzel thins or carrots with hummus
Cucumbers, romaine lettuce with a greek yogurt dip (weelicious)
Apple slices with choc. pudding (kozyshack no preservatives)
Mangos, melon, cutie oranges, unsweetened applesauce
Asst. of berries (strawberries, blueberries, blackberries, etc.)
Yo Kids yogurt sticks or yogurt shakes
Trader Joe's or Whole Foods granola
Grape tomatoes with a mozzarella cheese stick cut up in little pieces
Z-bars
Whole wheat crackers with all natural peanut butter
Whole wheat bagel thins with cream cheese
Boars Head ham & cheese, Boars Head turkey and cheese on a whole wheat wrap
Good old pb & j on whole wheat bread (all natural peanut butter and strawberry preserves)
Edamame with corn
Celery with peanut butter and raisins
Banana with honey and almond butter
Roasted sweet potato chunks with cinnamon
I don't do juice boxes, usually I only pack water because both my kids usually get a dairy (cheese, yogurt, pudding etc.), a veggie, a fruit, a protein/whole grain and a small treat (fish crackers, z-bar, cliff bar, all natural bunny graham crackers, etc. ).
I work full time too. I really just try to think of what I like to eat for lunch and then make extra for the kids. :)
I hope this helps!
K.