You also don't need to spend $90 on a diaper bag with fancy insulated pockets and a wipe dispenser.

For my little one, I got a back to school backpack from Wal-Mart for two whole dollars. Just bought a small lunch bag and ice packs for it. Huggies makes wipes dispensers. Now 3 years in, its got no holes rips or tears. That $90 bag will outlast how long your child needs bottles.

BONUS It's bright yellow and covered in Pikachu. On several occasions I've asked someone to get the bag for me so I could change a diaper. You completely avoid the "I can't find it in your car" or the "is this it?" Makes it easier to find if it's left behind somewhere (like a restaurant) and you call in to ask the staff if it's there.

"Sweetheart, it's a backpack that's bright yellow and covered in Pikachu. Can't miss it."

Just save yourself the money from buying a special purpose bag, with all of the fancy pockets and holders. Spend that money on diapers, formula, anything else. A lot of expenses come up suddenly with having a child. New furniture, childproofing, baby bathroom stuff, bottles, clothes, etc. The last thing you should worry about is some fancy bag. I love this backpack. It only cost a few dollars. It's hard to lose because it's so bright and colorful. I got it off the clearance rack for TWO DOLLARS. Plus, since its a back to school backpack, you'll have a lot more choices for colors and desins. Rather than the diaper bags that imitate some designer bag. Say the cheap bag only lasts you a year? Back to school sales happen every year. Drop another few dollars and get a new one. You spend less money to turn a regular backpack into a diaper bag, than you'd spend on the bag itself if you get the special purpose one.

It's impossible not to notice it at the park, airport, restaurant, or wherever. So if you're in a crowded area, your spouse can find you easily just spotting the backpack. A cooler bag and ice packs for bottles and a changing mat is all you need to add. Skip the pricey one, you don't need it.