I wanted a nappy wallet to keep all nappy changing items in one place. I had a nappy bag, but found I was searching for a nappy, then I needed to find wipes, sanitiser, nappy rash cream and as I use cloth nappies I needed to find my wet bag. They were all in my nappy bag somewhere, but somewhere being the operative word! Nothing was every together. I also figured as my daughter starts toilet training I will still need a change of undies, wipes, sanitiser, wet bag etc, and having it all together would make life so much easier.
I use cloth nappies and comfortably fit 1 nappy (can fit 2 but I find it makes the wallet a bit bulky then), change mat, wipes container, sanitiser, wet bag and nappy rash cream in the wallet. You could comfortably fit 2-3 disposable nappies. I keep spare nappies in my larger nappy bag, and replace into the wallet when I use one from there. The wallet makes nappy changes a breeze when out and about. I just grab the wallet and head to the change room without having to lug my whole bag, and I have everything I need. Often if I'm just heading out for a short trip, e.g. trip to the local park or grocery shopping I will just take the nappy wallet instead of the whole bag. The wallet has an elastic wrist strap so you can carry it around your wrist to have your hands free.
Check out the Kaboodle Nappy wallet for yourself.