Before proceeding please check out this improved version, the stopper mechanism is much better!
I didn't like the original built in handle, so I created this remix which uses a separate handle which can be attached with 2 M3 bolts.
Simply insert the M3 bolts through the drawer body holes from the inside and screw the handle on.
A nice feature is that the handle can be printed in a different color, allowing some personalization :)
Update:
The author remixed this model.