Bevel makes disposable safety razors for travel. Yes disposable double edged safety razors. They are quite nice nice. It's a plastic handle with standard double edged blade in there but it's non removable.
I stand corrected! I do suppose I could also get a travel safety razor that comes apart into 3 parts (as opposed to a single piece with a butterfly opening) and pack them separately. Of course that could mean some blade wastage: I'm rarely in one location long enough to use up all 5 in a pack.