I have an OiOi CarryAll, and in one side it fits 4 nappies, wipes, wetbag, cream and the other side I chuck in clothes, toys, snacks, general crapola. Then there's a zip pocket on each side for wallet, etc, and a bottle holder pocket on each end. Plenty of room! Though the nappy side CAN be a little snug...but I totally don't need to pack 4 nappies, I've NEVER used them all at once haha! A nb might be different if you copped a run of poos...I haven't used this bag with a nb yet.

Some of the newer OiOi CarryAlls don't look like they have the zipper pockets on the outside. Mine's pretty roomy though!