I recently got an email update from What to Expect (much like I do everyday) with an article link to "Diaper Bag Must-Haves". I agreed with all their suggestions, but had a few of my own to add.
This is a no-brainer as it IS called a "diaper bag." I usually try to keep at least 4 or 5 in there so I don't have to constantly be refilling it as the only time he goes through more than 1 at a time is when he's over at my mom's while I'm working or out.
I always keep a package of wipeys in the diaper bag
3. Diaper rash ointment
I prefer Desitin and always keep a tube in there
4. Sunblock (in the warmer months)
You never know when you might go outside for an extended period of time & you don't want baby to get burned so it's a good idea to keep some of this in the diaper bag. We use Huggies Little Swimmers waterproof spf50 sunblock.
5. A spare bottle
Cuz kiddo might randomly decide to get hungry at the most inopportune times!
6. Some baby food
At Target and Babies R Us you can find small formula containers like the one in the picture by Munchkin where you measure out the formula powder beforehand and then just pour it into the bottle when you need it. I LOVE this product and am soooo glad to have it - it really comes in handy and I don't have to carry an entire tub of formula with me! This particular one has 3 separate spots.
7. Your kid's "lovey"
Jay's is his stuffed Elmo so I make sure to always put him the diaper bag before we go out.
Jay drools A LOT right now so for us it's mandatory to have an extra bib in the bag and of course a burpie cloth is needed in case he eats while we're out and about.
9. A blanket
More for the colder months, as you never know how the weather will be - one minute it's in the 70s and your kid is in shorts, the next it's in the 50s and you need something to throw over his legs! Plus, if you're driving in the colder months and something happens where your car breaks down, doesn't hurt to have a blanket on hand, especially for kiddo!
10. A spare set of clothes
In case your child has a blowout in his diaper that goes up his back or some other massive mess that requires a change of clothes while you're out.
Honorable Mention: A bottle of water
More so in case you get stranded somewhere like if your car breaks down - if kiddo gets hungry you can mix a bottle for them (assuming you have #'s 5&6).