Here are dd and ds lunch bags. I got 2 each after last year's experience where dd didn't close one container properly and leaked tuna oil through her bag so it's good to have a spare!
For containers I use this style plus other sistema brand containers depending on what they are having.
I add an ice brick or gel packs to keep things cold.
Water bottle is a thermos funtainer which is great for keeping drinks cold. I am looking for a different style bottle that is not a straw as it is a pain to clean!