Porsche P3140 shaker pen

Gadgets come in all forms and don't have to be electronic. Most gadget
pens allow you to write under water or upside down. This Porsche
designed pen is unique. It's classy weighted finish is a sophisticated
item with discrete looks. Not something that common with branded pens.
Ditch the mont blac and get yourself one of these. Shake it and the
pen nib pops out, another shake and it's gone.

It is a very nice everyday pen, but you will have to be willing to
spend that little extra.