I've been using one for a while now. I found a fairly small very sturdy two piece one at Target a while ago. About 1.75-2 altoid tins in volume. It works great.<br><br>I have been toying around with the idea of using an eyeglass case. I picked up a couple of thin, hinged, very hard plastic glass cases from a local shop. I would guess volume is about 2-2.5 altoids tins. They fit really nicely in the pocket. On advantage would be that you could store your spectra cord inside and the case would not arouse much interest or suspicion if someone else would happen to see it.