Yay, another Emma on The Beach!
One idea for lunches: I bought a special container for salad that has a main compartment, and smaller one in the lid for dressing and/or nuts, etc to be added later. It has a little gel freezer pack that inserts in the lid as well to keep everything cold and a fork and spoon fits in the top. I found it at Ross for like $5. Totally worth it! I often bring kale salad, dressed (it gets better as the kale wilts) or caeser salad, undressed.
Also I use a small insulated bag with a gel freezer pack to bring celery sticks, hummus with cut up veggies, etc etc. I often bring cups of instant dried black bean or split pea soup - if you have a way to get hot water (even the hot water from a water cooler works).
In Phase 2, if I am on the go, I pretty much wrap anything in a 100% whole wheat tortilla - banana with natural peanut butter, cheese with spinach or broccoli slaw, tuna salad with romaine lettuce, etc etc. This transports really well.