4. The Keep Yourself Tidy Backpack
The
idea for this backpack started with a vision - to make packing, keeping
and carrying all your belongings more simple. The manifestation of that
vision was Tidypack - developed by and made for globetrotters.
The
Tidypack Backpack has shelves which can be extended by hanging it over
a door. Just pack your clothes into the various compartments, close the
rucksack and you are ready to go. When you reach your next destination,
just extend the shelves and hang it over a door.
TidyPack
looks very much like any other backpacks; it's just that the interior
consist of an useful and expandable wardrobe system. Designed and
developed by Marit Lien, this sure is a neat idea. (Pun intended.) Source.

3. The Total Stereo Backpack
The
problem with most portable music systems is that you can't easily share
your music with others or blast it wherever you go. Thankfully, someone
has created the solution.
According to design student Joonas Saaranen
"Reppo II is a hardshell backpack with an integrated high quality
digital amplifier and pair of speakers. This beauty comes in a
ultra-cool shiny hardshell backpack that gets heads turning. Just plug
in any audio source, strap the whole thing on your back and share your
favorite tunes with your friends on the go." Via Technabob.

2. The BulletProof Backpack: Backpackshield
Wouldn't it be great if your backpack could save your life, not just help you carry your stuff?
The
backpackshield is a bulletproof backpack insert that can stop 9 mm and
44 magnum rounds of gunfire. Backpackshield is not a backpack
technically but an insert that can be switched to another backpack if
you outgrow your pack or decide to switch styles. Made from 13 layers
of K-29 Kevlar, this thin, lightweight plate fits in most backpacks.
According to the inventor, this was designed for "college students,
high school students, concerned parents, and commuters." I guess
schools have really gotten dangerous, huh? Available in 10 assorted
colors, it costs $279USD. If you don't want to change shools to keep
your kid safe, I guess the backpackshield can offer some much needed
safety. Source
If you insist on an actual bulletproof backpack, well, you could get the one here .
1. Got a Big Butt Backpack
Love
big butts and want to carry some around everywhere you go? Then you
surely will want to lug around these “female form” inspired backpacks
dubbed “The Peach” by Yen-Hsiang Skeet Wang.
The artist liked the juxtaposition of the erotic female form with
something totally unrelated so I guess he thought...hmmmm, I wonder how
good a butt would look as a backpack. If I wore this backpack, I know
no one would be looking at my real butt and thinking it is big, so I am
all for getting one.
by Toby
These are all cool!
Who would have thought there were so many things that could work in a backpack environment! Super finds!
by Anonymous
yeah
strange and some good. There might be out there also a thing like a backpack but just the "floor" and for the arms and another for to hold the handles of plasticbags across the back with two straps down from the one across the back to hold the handles of the plasticbags. Trying to find such but probably uber expensive. Already asked a backpack maker to see if there is such a thing but haven't had any response. Probably also only good sometimes for those who have to push a wheelchair and cant hold the bags at the same time and cant have the wheelchairbags for one reason or another. So probably very small market for those.