I have 3 bags these days.

My regular handbag for use when I'm at work or for rare times that my son is in daycare & I'm out and about without him.

Daycare bag - this is the original nappy bag I bought - decent size which can fit lots of nappies, changes of clothes, bottles etc in it.

Small nappy bag - for my days off & weekends. I only was able to start using this when my son got older & didn't need to cart as many changes & bottles etc. I put my purse in it & off we go. It hangs off the stroller & off we go.