book
thingiverse
Little box looking like a book, you have to turn the top upside down for printing. I changed the color of the filament after 2 layers manually.
Download Model from thingiverse
With this file you will be able to print book with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on book.