Rectangular Sauce Bottle

Ultra-realistic product photography of a hot sauce bottle on a neutral background, single bottle centered, studio shot, no props, no hands, square artisanal hot sauce bottle made of very thick clear glass, flat front and flat back, straight vertical sides, slightly rounded corners, heavy solid glass base, short neck with subtle rounded shoulders, square footprint, matte black plastic screw cap, straight cylindrical shape, medium height, flat top, no logo, bottle containing a very dense, opaque hot sauce, sauce appears as a solid opaque mass filling the bottle, no visible separation between sauce and glass, no visible inner glass layer, no hollow glass effect, the interior looks fully occupied by sauce, slightly lower fill level below the neck, soft diffused studio lighting, minimal reflections, reduced glass transparency effect, subtle shadow under the bottle, sharp focus, high detail, professional food photography, no branding, no label, no text, no illustration