I have reported before that Riley loves the occasional car ride. He has a harness that works with the seat belt system and a travel duffel with mesh ends for breathability. Unfortunately Riley is such a well traveled dog that his travel duffel has worn out over the past four years. The zipper along its bottom likes to unzip itself which could be problematic in the event that we are carrying Riley in it. Truth be told, Riley may in fact be a little heavy for the duffel. He has come a long way from his 5lb puppy days.
In deciding upon the purchase of a new travel bag for the Rye-guy a few things were quite important (especially since these things are not cheap): durability, construction, intended uses, comfort, and airline acceptance. We went with the IGo2 Traveler because its base is solidly constructed (no zipper to come undone), it doubles as a carseat and/or backpack, it has expandable sides, it also has wheels and a telescoping handle much like luggage nowadays. It's also accepted by most US airlines, a plus if we ever decide to fly with him.
I was a little nervous that he would not go in it because its slightly different than his duffel, but he's a smart little guy. It didn't phase him one bit. He did have a slight challenge hopping enough to clear his back legs (remember he is a dacshund with 3 inch legs after all) but a few practice tries and he is now a pro. I love this little guy.