Use a match box and sharpen on the striker.
Yes, you can bring a disposable razor in your carry-on luggage.
Yes, you can bring a disposable razor on a plane in your carry-on luggage.
Yes, you can bring a disposable razor on an airplane in your carry-on luggage.
Yes, you can pack a disposable razor in your carry-on luggage.
Yes, you can put a disposable razor in your carry-on luggage.
Yes, you can bring a disposable razor in your hand luggage.
Yes, you can carry a disposable razor in your carry-on luggage.
Yes, you can pack a disposable razor in your carry-on luggage.
Yes, you can travel with a disposable razor in your carry-on luggage.
The straight razor.
If you are up too it, get a waterstone, (norton 4000/8000 combo) is pretty much the standard. A strop is used to keep a razor sharp. A waterstone is to sharpen a razor.
Yes, you can typically take a disposable razor in your hand luggage when traveling.