At home I only use a straight edge, but I don't ever fly anywhere with one: the idea of having it found in my case, let alone my jacket pocket(!) and getting hauled off for questioning, is way too much of a risk. I travel a 1960's "butterfly" Gillette, at least I did until I noticed the only double edge blades I can buy locally --Wilkinson stainless -- had gone seriously downhill. I used to get plently of shaves per blade, and even if I got stuck without a spare, I could then put the blade into the head upside down and use the other side of the edge. However I think they must have changed their production venue, because now they won't stay sharp at all, no matter how carefully I dry them. So please can you recommend a trustworthy product (that doesn't break the bank) -- at least one that outlasts the plastic disposables that for the moment have had to replaces those stupid Wilkinsons?