We can now supply promotional stick on pockets for the iPhone and other smart-phones. A tried and tested product by us, its been in and out of my handbag throughtout the last month and it remains securely in place.
See this page. It's all you need when you are travelling; your phone and your oyster card!
Another product on the same lines is this iPhone case which is moulded with a card case. Your various cards are safely secured in the case pocket. The holders can be printed in full colour.
So why not consider doing an iPhone case promotion and get everyone noticing your really useful giveaway?