Abstract: A drop-in multi-optics module for a quantum-particle (e.g., rubidium, cesium) cell provides for more convenient and cost-effective manufacture of such cells (including vacuum cells, cold/ultra-cold matter cells, vapor cells, and channel cells). In a 3D printing approach, a model of a frame augmented by buffer material is 3D printed. The buffer material is removed from the augmented frame to achieved desired dimensions with greater precision than could be achieved by 3D printing the frame directly. Optical and, in some cases, other components are attached to the frame to realize the multi-optics drop-in module. Alternatively, the module can be formed by cutting out portions of a metal sheet and then folding the resulting 2D preform.