It's the ultimate solution for travelers who are unable to get the space in their carry-on luggage to store a 4x3x2 mouse.  Space is at a premium when traveling anywhere, after all, so why take up space that could be used to hold an extra stick of deodorant if you don't have to?  Simply deflate your mouse, roll it up, and...  wait, what?  You don't have an inflatable mouse?!

I guess I should point out that no one has an inflatable mouse yet, since Yanko Design is more of a potential company and not an actual manufacturing firm, but if they had one of these available for the price of a normal mouse, or if I thought I could hack something together, I'd totally make/use a blow-up mouse, if only because it'd be awesome to fill with helium for pranking purposes.  Imagine the look in your co-worker's faces when you walk away from your desk and your mouse suddenly goes airborne!

H/T:  Engadget, of course.