Yeah.. it's a case made from that carton that's left from the toilet paper. One day i just saw lots of these lil fellas piled up in the trash can and i was like "mhm they have the shape of a cilindric case... i'll try to turn them into one!" and that's when i did this..
The first time i tried to made it i failed, it was kinda well it wasn't.. it IS kinda hard to sew the zipper into this material but eventually you get it right 8)
I tried to decorated outside but i didn't know what type of things to use for that. So i ended up gluing a small red heart [yes red] on the left side and a red [ or was it black?] button on the right side, which fell by the way, that's why you can't see it. Using a hot glue gun you can do this very easily, just be careful with it, you can burn yourself. That blue piece of fabric you see in the middle it's from some jeans.. yep i cutted that out from some old jeans i had.
This is how it looks from behind. 
Left side. 
Right side. This is the second most hard thing to do.. to put those small pieces of fabric on the sides. That's because you can't sew them, you gotta glue them and most of the time when you think you're done noup noup! it unglues all of a sudden! so, you gotta glue it very very well. 
Here you can clearly see the zipper, i used a black one but you can use any color you want. I think this is the hardest thing to do, in my opinion. I don't remember how many times i sew it and unsew it! 
This is the inside of the case. It's not very big but it has space for a few things :) [ yes i love sharpie]. I'd love to do another one but bigger! If i make one i'll show it here.
Things you'll need:
*Two toilet paper cartons
*Hot glue gun
*A zipper
*Scissors
*A needle and some thread
*Things you can use as decorations [buttons, ribbons..]
*Time and dedication :)