I bought one and replaced the Fox 40 on my keychain with it. It's not as loud as the Fox 40 but it wasn't a cheap toy whistle, either. I stuffed a couple of cotton balls inside the "secret compartment" and left it in a glass of water overnight. The next day I was able to ignite the cotton balls with a ferrocerium rod on the first attempt; they were bone dry.

Unfortunately, I left that set of keys at my sister's house in Toronto when I was on vacation back in August. But I wouldn't hesitate to buy another of those whistles if I see them again.

(Some of the colour did rub off but that's not a problem IMO.)