Maybe it was made for kids, but I couldn't resist. Nor could a colleague at work, who had one in the office first. Iconic, quite practical and beautifully made, this official Marvel Captain America shield backpack looks much better on Karis, above, but I like it too.
There are a number of similar items going around, some of which are soft shelled and cheaper, but this one is worth holding out for. The shell is shiny and hard, there's a nice easy zipper around the edge and multi pockets inside. As one buyer on Amazon said, "Looooooove it."