One glance at the dot matrix Tyvek wallet, and I was having flashbacks of the first printer I ever had, which had to be fed with reams of perforated paper and spat out square, clunky characters with every rebellious squeal. Still, I wouldn't mind a simple wallet like this to tote my cash around in. Folded up, it looks just like wad of printed paper and it's printed with the first 3,000 numbers of pi, so you'll always have something to read if you get bored.

The wallet's made of Tyvek, which feels like paper but is made of lightweight and durable fibers. It promises to expand enough that you can pack up to 25 credit cards into this baby without rips or tears. Plus it's made from 25% post-consumer recycled content and is itself recyclable. A neat way to boost your geek cred without exacerbating the e-waste situation.

Available for $14.99 from perpetual kid.