Babies need a lot of gear -- especially when there are two of them! Your diaper bag is going to become your home away from home. So choose a large bag with lots of pockets. You'll use the pockets for all of your twins' needs, plus the things that would usually go in your purse.
Always keep your diaper bag stocked with:
A portable changing pad
Diapers (1 per baby for every hour you plan to be out)
Disposable diaper wipes, alcohol-free
Plastic bags (for dirty diapers or wipes)
Diaper rash ointment (with zinc oxide cream or petroleum)
Clean bottles and formula (if you're bottle feeding)
Water and snack for you
Extra Baby Clothes
At least one change of clothes for each baby
Hats, jacket, and socks for changes in the weather
Baby Entertainment & Incidentals
Sunscreen (for babies over 6 months)
Keep your baby in the shade, if possible. Their skin is thinner and more sensitive. Cover them up with clothes and a hat, limit their time in the sun (especially between 10 a.m. and 2 p.m., when the sun is strongest), don’t let them get overheated, and get them out of the sun right away if they show any signs of sunburn or dehydration, including fussiness, redness, and excessive crying.
Huggins, K. The Expectant Parents' Companion, Houghton Mifflin Harcourt, 2006.
Farber, E. Baby Lists: What to Do and What to Get to Prepare for Baby, Adams Media, 2007.
Fierro, P. The Everything Twins, Triplets, and More Book, F+W Media, 2012.
FDA: “Should You Put Sunscreen on Infants? Not Usually.”