At the beginning of last school year, I put together a little kit of essentials to keep in my desk drawer for those days I had to stay late at school. I purchased a small plastic container and filled it with travel sized items like toothbrush/toothpaste, deodorant, hairspray, floss, nail file, hair brush, stain wipes, hand lotion, lint roller, pocket tissues, and hand sanitizer. I cannot tell you how many times I have used something in that kit! It is convenient to just grab the whole container and take it to the bathroom to 'freshen up' before parent conferences, open house nights, etc. I decided I would make a few kits as gifts this year. I added a cute little label that I made in Photoshop and printed out on sticker paper.
You could also add a sewing kit, band-aids, medications, or anything else one might need. Each item was around $1 or less so this makes a really inexpensive yet practical gift!