Vertical 9:16 video, fast-cut montage. Ultra-realistic smartphone footage, handheld iPhone style. Inside modern American car interiors. Consistent black car cup holder expander, exact real-world shape. Scene 1 – Problem: Extreme close-up of a factory car cup holder. A large insulated tumbler is placed inside and does NOT fit. Cup tilts and feels unstable. Quick cut. Scene 2 – Install: Close-up of a hand pressing a black cup holder expander into the cup holder. Firm push. Expander locks securely in place. Quick cut. Scene 3 – Perfect fit: The same large tumbler is placed into the expander. Perfect fit, no wobble. Hand gently shakes the cup to show stability. Quick cut. Scene 4 – Handle compatibility: A handled tumbler (Stanley-style) slides into the expander. The handle passes smoothly through the U-shaped opening. Clean alignment, no interference. Quick cut. Scene 5 – Driving stability: Car driving slowly on a smooth road. Close-up on the cup holder. Bottle remains upright during turning and light braking. Natural lighting, realistic shadows. Stable framing, no flicker. Product remains rigid and unchanged. No deformation, no morphing, no AI artifacts. deformed product, changing shape, bending plastic, melted material, warped object, flicker, jitter, shaking artifacts, unreal texture, AI morphing