A heart box with a stylish twist!  Available in Gothic, Skeleton and Skull versions - but this is  the blank, customisable version, and it's free! 

Bundle - All three!: https://www.myminifactory.com/object/3d-print-84050

Gothic Heart Box: https://www.myminifactory.com/object/3d-print-84047

Skeleton Heart Box: https://www.myminifactory.com/object/3d-print-84048

Skull Heart Box: https://www.myminifactory.com/object/3d-print-84049

This download contains all the box parts, including a blank lid outer panel, ready for you to take into your favourite CAD package and customise!

There are a few things you might want to bear in mind when you're adding your own designs:

* Remember that lots of tiny details can cause lots of retractions, which can cause layer adhesion issues or nozzle clogs!  Try instead to keep your fine details continuous rather than a series of small points.

* The design will be face-down on the print bed, so make sure that all parts of the print are sufficiently large to stay stuck down!  Or, use a raft, if you're confident that won't mess up the surface.

* If you're adding features to the sides, remember that it prints face-down, so watch for overhangs or excessive bridging that might cause problems.

But hey, it's 3D printing, and that's what's so great about it: if you have problems with the design, you just fix it and print off another version! :D