I usually travel with a Feather Portable DE or Gillette Travel Tech. On my last trip to Switzerland to save weight I brought a Trac II handle and a pack of cartridges. The Trac II broke half way through the trip.I shaved by holding the blade between my fingers. I usually bring a disposable Bic or two for a backup but this time I did not. I finally got a double blade disposable at one of the hotel desks. I have no idea where razors are sold in Switzerland.

I find the single or double blade disposables as good backups when flying. I would rather not have the extra weight of a strop and a small hone.