You might have guessed from an earlier entry, but I am on this yacht sailing the Atlantic for a while. Posts will be very sporadic, but I'll be back half of December. As you know; everybody needs a break sometimes... Keep on folding!
Folding bike helmets are not a bad idea. Normal helmets are difficult to store and honestly you don't really wanna be seen carrying one entering your local pub. The inventor of this folding bike helmet seems to have some experience with helmets, designing and cycling accidents. More info here.