There is a lack of physical models (laboratory phantoms) that are able to realistically mimic the biomechanical behavior of aneurysms during rupture. To better understand the aneurysm rupture mechanics, this study focuses on the design and implementation of a cost-effective and easy-to-fabricate phantom using a 3D printing technique. To facilitate a predictable rupture event in the phantom, we utilized a computational model to find the weak spots and adjusted the wall thickness, mimicking wall thinning phenomena. This phantom model can also be used to validate computational models, test stent and coil devices, and provide surgical training.