Mintyboost is offering a kit that transforms an Altoids Chewing Gum tin into a portable iPhone USB charger that works with both iPhone and iPhone 3G. It also works with the iPod family. This kit isn't for novices though, as it requires a soldering kit and a steady hand. The Mintyboost kit will set you back $19.50. You'll need to secure a tin of Altoid's Gum, as it's surprisingly out of stock on their site. For all the sorted details on how to create this dandy portable USB iPhone charger, check out forum member psylichon's how to guide in our forums .