cheaper still and no adapting to do - I used to use the cap of a bic biro (there's a hole in it to stop little uns choking on it) and it worked fine. In fact I still use the cap latch to prise off my Dell protector when it gets a bit too bubbly.
I have a Belkin 4 in 1 that my brother bought me for my birthday now, and must admit that it looks (and feels) much swankier than the bic!
