"A Japanese perfume company called Chaku Perfume has made a small iPhone accessory that allows you to remotely trigger a puff of fragrance or other smell to someone else’s iPhone. Using the accompanying app, you can send a fragrance blast to a friend who also has the accessory and app. [...] The accessory plugs into your iPhone’s 30-pin port (sorry iPhone 5 users), and contains an atomizer and a small tank of the perfume of your choice. Once the device is plugged in and you have the app ready to go, it’s all a matter of tapping a button to release a small scent of perfume for your nose to enjoy."
Thus reports shlashgear.com (via CNET) mentioning the cost is 63$ which seems rather sane for something that could be used to use to trigger scented puffs whenever you want to (or sending off a smell to a friend).
Imagine if it can be filled with juice off the counter or your perfume closet! Priceless.