I remixed the open sided version of a business card holder made by 3DprintedLife and posted here https://www.youmagine.com/designs/basic-business-card-holder-v2#information by adding my TinkerCAD created butterfly to it, and melding the two together in MeshMixer. I've printed it in Faberdashery Galaxy Blue PLA at 210 C on an Ultimaker 2. It was sliced in Cura with a .15 layer height.