DIY Guardians of the Galaxy Mix Tape Box Printable from 30 Minute Crafts. When I first saw the this I thought it was a printable that went in an old cassette tape box – but it’s not. So all you need is cardstock to print out the mix tape box. First seen at Geek Crafts. TIP: If you see something you like, download the printable now. Lots of blogs have disappeared along with their free printables.