During a 400ft bungee jump in New Zealand, we decided to either stop jumping off bridges or own a wallet we could be proud of. The result was our first duct tape wallet... unfortunately we had to hand it over with our pants to a fish and chips vendor in Auckland (OK, so sticky side out wasn't such a good idea). But, back at our research lab (kitchen table) after many hours of work, and the loss of our fingerprints.... the 'Classic' was born.