eu me interessei neste

http://www.artlebedev.com/everything/folderix/

e onde comprar

http://www.amazon.com/Folderix-4GB-flash-drive-yellow/dp/B001IUSM7Y/ref=sr_1_1?ie=UTF8&m=A2BI92681AL32I&s=generic&qid=1310317824&sr=1-1