Courtesy of MakeZine, which came to them via ReadyMade (the Internet is a giant circle):
You can convert any bag into a solar charger for your gadgets.
(Please note, this design is a bit underpowered compared to the usual Voltaic bags which have three 1.3 Watt panels so charge times will be proportionately slower).
All you need is the following:
Step 1: Parts and Tools
1-3 1.3 Watt Panels ($30-$90)
1 Circuit Box Set ($3)
1 JetPack Battery Set ($75)
1 used/salvaged handbag, preferably with a flat front
Needles & thread
Visit their site for pictures and details