This was something I thought be cute for the upcoming Valentines Day next month.
Here you go, a Voronoi Heart to give.  No supports requried.

    To create the model I modeled it in Solidworks and then used a Voronoization generator that broke up the STL file to be a outer surface shell with a hole pattern for the Voronoi design.  This generator can be found in the following link: https://www.voronator.com/