A novel 3D printing technique based on two complementary liquid copolymers, PEG4-PCL–SC and PEG4-PCL–NH2, that are injected in a coordinated fashion and react with each other to form a pre-designed 3D pill. This unique 3D printing apparatus can be used to produce pills at home when the required medication does not handle current production techniques well and may have other possible biomedical applications