Multiphone chargers: http://wholesale.buysku.com/Electronics-image/2012-9/3-in-1-Retractable-Wired-Smart-Car-Charger-wtih-Dual-USB-Outputs-for-iPad-iPhone-iPod-Nokia-Samsung-HTC-LG-White-6348316138615237502.JPG
I have one with thunderbolt iphone 4 and android -it's amazing
Beer openers , everyone wants one
Glass/screen cleaning re-useable wipe
Phone charging pack : it looks like a USB stick from the early 2000s but it is a reuseable phone charger (got one off a conference, it's a life saver I keep it in my backpack fully charged at all times as it can revive a phone from 0 to 70% battery)
Not sure this is the right place to ask for this kind of stuff however I'm happy to Skype you and talk with you (for free) to understand better what you want to learn/understand of APIs and PHP !