When I was in Paraguay found many Quanta brand products, Although China sells only there. One of these products was this Pen Drive Minion.
Has 8 GB and it cost some 20 real.
To use simply remove the head of the pet.
It is also a key chain.
Works well and so far gave no problem. Sorry I have not found anything like it in China. I leave a link below for different Flash drives from DealExtreme: