not exactly the same thing.. but i carry what is called the nannypack.. i basic blue jansport with everything i could ever possibly need for nanny survival..

diapers
wipeys
change of clothes
first aid kit
granola bars
sippy cups
random small toys
kids movies on dvd
laptop
mobile phone
notepad with vital information
crayolas and sketchbook
a $20 bill

i basically have everything i could ever need while away from the house with the smaller kids.. just the other day we took a trip to the natural history museum and ended up having to make our own way home via public transport.. it was a 2 hour adventure and you can be sure that i made use of many tools the nannypack had to offer.