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It is a voronoi style model. You can do that by yourself too.
This is a voronoi object, so no support should be required. Set object on the build plate standing up. Use brim to hold is securely to the plate. To minimize stringing on an FDM printer, print at as low a temperature as possible (e.g., 180°C for PLA) and at a slow speed (e.g., 20 mm/s). Set movements to a high speed (e.g., 200 mm/s).