Originally Posted by
Sactown_Albert
To keep your contents from sagging into the front wheel, you could consider putting a thin, but stiff plastic liner inside of the bag for the contents to sit on top of. The bag looks small enough that you could clean and cut up the flat side of a 1 gallon milk container for this purpose.
I typically cut up and re-tape a cardboard box so it just fits the inside of the bag. That way the bag sits nice and spiffy.
To be fair, this Kangaroo bag seems to have some kind of internal supports like those Cannondale bags, so it already holds its shape very well.