I picked up this Clip-On Mesh Organizer Bag to add a bit of structure to the care packages I send, and it does that job well. The mesh front means you can see what's inside without unzipping, which is handy when you're digging for cords or a pen. It's lightweight, so it doesn't add much bulk, and the clip makes it easy to attach inside a backpack or duffel. I used mine for toiletries and small cards. Nothing fancy, just a simple organizer that keeps small items from disappearing to the bottom of the bag.