This lunch box is good quality. The only problem that I have had with them in the past is that hte area in the cover where the velcro is, tears after a while. Otherwise, we love it.
size is a bit too large to fit in a back pack. If the backpack had a pocket or something that it could easily attach to on the outside it would all be great.
I bought this for my kids in elementary school and this is a great lunch box. Large enough to hold drinks plus cold pack plus lunch plus mid-morning snack without squishing the sandwich. Easy to clean and very hard-wearing. I don't expect to have to buy new lunchboxes for several years.
