This backpack is a little smaller than our usual kids' backpacks, but has straps with quite a range of length adjustment, so it would should work from a smaller child up to a possibly a small adult.
It can be adapted to hold all feed bottle types (up to 500ml), Nutricia (including goframe), Abbott FreeGo & Amika pumps.
It will hold a nutricia goframe with up to 500ml bottles also.