two-can beverage holder 3d model

“Create a 3D‑printable vertical two‑can beverage holder that stacks two standard 12oz cans on top of each other. The design should be a smooth, modern, rounded rectangular tower with two circular cutouts sized for 66 mm diameter cans, 3–4 mm wall thickness, and a flat stable base. On one side of the tower, add a recessed modular dovetail rail that looks like a clean design groove when unused. The rail should be 120 mm long, 20 mm wide, recessed 4 mm deep, with 45‑degree angled dovetail walls and a 15 mm inner slot for slide‑on accessories. The rail must be flush and low‑profile so the holder looks sleek without attachments. The model should be a solid, watertight STL optimized for FDM printing without supports.”