I sell it so I'm a little biased BUT I would recommend the Organizing Utility Tote.  I used one as a diaper bag BEFORE I started selling it so I loved it before it paid to love it.  A lot of the women in my church use the Organizing Utility tote for diaper bags.  I also used the Cindy tote for awhile since I was a FTM (first time mom) that overpacked for everything. https://i.pinimg.com/236x/60/bb/2d/60bb2d02ca34c06a3e9e3ed1b712c6d1---gifts-thirty-one-gifts.jpg
This was especially true when it came to feeding. Originally, I told myself we would breastfeed―exclusively. I had built up the idea in my mind that this was the correct way of feeding my child, and that anything else was somehow cheating. Plus, I love the connection it brought us, and so many of my favorite early memories are just my baby and me (at all hours of night), as close as two people can be as I fed her from my breast. https://i.pinimg.com/236x/09/31/b8/0931b86d4c8918d6fa34123e8f5f4717.jpg
Skip Hop makes some excellent diaper bags, and this one is no exception. The Skip Hop Duo Signature has a slightly more modern styling than the classic lines and colors of the Grand Central models, and is shaped more like a tote or over-the-shoulder bag than it is a purse. It's narrow and deep rather than wide and short, and a bit smaller overall than the purse-shaped models, so it's good for someone who doesn't want to be lugging around a truly enormous diaper bag. It's also about the same width as most strollers, so it doesn't stick out on the sides a lot when you hang it on the handlebars. But while it's smaller overall, it's still super functional. It has 10 pockets, a separate insulated bottle holder, a breathable side pocket, a key ring clip, diaper changing pad, and a great interior liner. The Skip Hop Duo's main interior pocket is super deep and we loved the lining, it was soft but also rugged enough to make wipe-cleaning easy. The padded shoulder strap was comfortable, as were the padded carry-handles. We were able to fit everything in that we needed, including diapers, wipes, baby bottles, and cloths. Being relatively tall, we found that when it was fully loaded it did tend to topple over sometimes. We also found it less convenient to reach in and easily grab something, since things tended to get stacked on top of one another, so this design might not be for everyone. Also, the changing pad was a bit small relative to some others on this list. So, this Skip Hop Duo Signature model is an excellent diaper bag, with some minor drawbacks. Note that Skip Hop also makes a Skip Hop Duo Diaper Backpack that is very similar to this but in the backpack style, and is also very well-reviewed. Interested? You can check out this SkipHop Duo Signature diaper bag here. https://i.pinimg.com/236x/69/53/cf/6953cf980705b09f31df901c7eb882e0--thirty-one-thermal-my-thirty-one.jpg
I have a regular diaper bag (eddie bauer one) and I also have a utility tote from 31, that I got personalized for the baby, I got it thinking I may not use it as a bag for when he is real little as they seem to need more stuff, but to pack stuff up when we travel, like going to the beach as an extra bag, or to grandma's, aunts etc..  I love the 31 bags, they are nice and durable. If I wouldn't have gotten my diaper bag for a shower gift, then I probably would have just used the 31 bag as my everyday diaper bag! 
The Duo, which has been sold since 2003, has been a longtime best-seller from a company that makes almost two dozen different diaper bags. Just about every retailer we visited—chains, boutiques, and consignment stores, plus online retailers—carried this bag. Parents can pick from a dozen neutral or bold, graphic prints, and on some colors the interior is made of a light-colored fabric so that you can easily see what’s inside (not all diaper bags have gotten the memo on this). https://i.pinimg.com/280x280_RS/24/0f/29/240f2961364ce73cdaa77c82d468860d.jpg
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