But you might want to watch your calorie intake on your next trip…this useful gadget can only accommodate riders up to just 260 pounds. Invented by Chicago entrepreneur and avid traveler Kevin O’Donnell, the idea struck him when he was pulling his kids on a suitcase at the airport. Working together with his motorcyclist friend, Boyd Bruner, the bag they developed can travel at 8 mph up to 6 miles on a single charge. Best of all, it can easily convert from motor to pull use. It comes with dual USB charging ports for electronics and optional tracking in case someone tries to take it out for a joy ride without your permission. The first wave of pre-orders started shipping in June for $1,495 plus $50 shipping; Modobag.com.