Your backpack is your constant companion throughout your academic career and, in many cases, long after. What are the essentials in your bag that get you through the day?
To get things started, here's what's in my backpack:
If you'd like to share the contents of your backpack, post it all in the comments. Be sure to include a picture and detail why your items are portable essentials. (Try to fit it all in one picture; if you've got more than one image to share, reply to your first post.)