When my kids were young every car trip involved taking along things to keep them busy enough so they would not complain about the drive. This also meant that the back seat would get pretty cluttered and that's when I looked into car back organizers. I wish I had one with so many separate compartments as the back seat organizer from Fancy Mobility Car Organizers. This organizer has 15 places for storage.
There are straps for the top and bottom which are adjustable. Simply place the top strap around the headrest of the front seat and clip it together Then adjust the bottom strap to fit around the bottom part of the seat. You can tuck the dangling strap ends into the seat so they are out of sight.
The super large top pocket has a flap and comes with a flap that can be closed with velcro pieces. There is a clip on the left side that can be used for a pacifier or anything that you need to hang to have easy access to. The pockets are deep enough so they can easily hold a bottle.
A nice touch is the vizor that can hold two pens and has three storage areas large enough for documents and headphones.
The backseat organizer is machine washable and the visor can be wiped down with a damp cloth.Backseat Car Organizer - Kids Toy Storage - Comes with Visor Organizer $12.97 $19.99 Fancy Mobility
Backseat organizer size: 22.1" x 12.4", length of the straps: 48" bottom, 16.5" top.
Visor organizer size: 12" x 6.9"