Totally Tubular

This high-tech luggage cart, called the dTube, folds into a sleek 17-inch cylinder that fits easily in most carry-ons. Unfolded, it can be loaded down with 60 pounds of luggage. It takes less than 10 seconds to accomplish this transformation, so travelers have one fewer excuse for missing that connecting flight.

Cart, $49.85; Magellan’s, (800) 962-4940, Internet https://www.magellans.com.