Pen Pen's backpack from Neon Genesis Evangelion

Easily printable model of Pen Pen's backpack. You could put it on a penguin plushy to turn it into Pen Pen or you could place it on your pet for cosplay.
There are 3 small slits where you can fit a thin elastic into, they are quite small so you may need to use a needle to get the elastic through.

I based the size on my dog and she is quite small so you may need to increase the size for your own pet.

Fusion 360 file is included if you want to mess around with it or increase the size of the slits.

Update 16-08-2020: I've now added the name tag for Pen Pen also with printable screws to attach to the elastics.