One other great travel accessory is below, NOT a cup holder, but still beneficial:
If you are looking for duffel bags, I would suggest that you shop on the Internet and find the bags that are available. This website has the lowest prices that you will be able to find and the bags are very high in quality (high quality like our drink holder. I placed my order and the bag arrived in lass than one week, I purchased two duffel bags for a flight that I was planning, one bad I purchased for solid red and the other was a mixture or red and black. What you should look for with duffel bags, is a lot of storage, both bags had pockets on both sides and this helped because I was able to store all of my essential items in addition to my cell phone and charger. Traveling can be very expensive, this is why you need duffel bags. Having a smaller bag will eliminate the need to pay very large baggage frees, I also found that many of these bags have a lot of storage space, this allowed me to store all of my clothing and wheelchair accessories instead of using luggage.
Considering that the airline charge fifty dollars per bag, these bags work well to save you money. There are many colors and designs available, purchase one with a supportive shoulder strap and you could use this for light traveling. These bags are very inexpensive and the material is durable enough to take a beating without risk of breaking, you can purchase bags with a simple design or large logo if you desire. I also purchased a luggage scale, this can be attached to the handles of any bag and provide you with an accurate weight within seconds, these are easy to use and they can help you to keep your bags within acceptable weights in order to keep from paying for a larger bag.