Pampers Swaddlers Diapers w/ wetness indicator. This brand helps contain leaks better than other other brands, IMO. Have tried competitors and haven’t had much luck…repeat offenses. We always end up back with Pampers. Wetness indicator turns line up the middle from yellow to blue when diaper is wet, taking the guesswork out of it. A new baby will go through 15-20+ diapers/day…you do the math. That’s a lot of diapers and a lot of dough!
Once you figure out what diaper brand/sizes work for you, Diapers.com offers pretty fast shipping (1-2 days, free if you spend $50). Stock up by the case, but not too many in one size. They grow sooooo fast. There is also Amazon Mom. Same thing.
I also like The Honest Company. They make chemical-free, natural products…everything from diapers to laundry soap. Good company started by Jessica Alba. Like what they stand for, just a little $$$ since it’s a membership. I did, however, see some of their products in Buy Buy Baby, recently. Very cute diaper designs. You can sign up for a free trial and they’ll send you samples. You decide.