I'd say a better bet is (slightly) increased sales of regular toothpaste. People will just buy a tube of toothpaste at the place they land. Look for airports to stock it in the stores so you can buy it on the way out.

Oh yeah, and there are also those Oral-B Brush Strips. Little packets of things that look like finger puppets, you put one on your finger and use them in a pinch when you don't have a toothbrush and toothpaste. I thought it was a stupid idea but now maybe they will take off (as it were).