Inspired by this Ipod nano case, I decided to try making a case for my iphone out of scrap bike tubes and/or tires (every bike store seems to have tons in back). Here’s my favorite version: the tube goes in the tire, just like on your bike:)

That version’s a bit bulky, so I typically use this slightly svelter sewed-together affair:

Here are some more photos; let me know if you try to build one and have any questions!