For those of you who are forever loosing your wallet the Vinco wallet may just be your answer.
A young entrepreneur from Leeds (UK) has launched his first Kickstarter campaign for a wallet that he has spent three years developing using standard sheets of A4 paper.
Update (29/06/15): Unfortunately this iteration of the Vinco Wallet never came to fruition. However, they did relaunch with a new improved version, which you can check out on the Vinco Wallet Website.
The wallet can be made using just a single piece of A4 paper, scissors and a little patience.
For just £5 of backing on Kickstarter you can get the finished wallet in a colour of your choice along with a guide on how to make a limitless supply of wallets for pennies.
If you would like to learn more about the Vinco wallet then check out their Kickstarter page here.