strict underwater bottom-up shot, camera directly below, pointing perfectly straight upward at 90 degrees, four transparent glass bottles submerged in slightly cloudy pale yellow meltwater, viewed strictly from underneath, all four circular bottle bottoms facing the camera directly and clearly visible, arranged in a tight 2x2 grouping, the lower parts of the bottles loosely bound together with a simple rough rope loop, soft natural yellowish turbidity from melted ice, subtle suspended particles, not blue, not muddy, no visible tank edges, no visible container walls, no corner perspective, minimal perspective distortion, clean geometric composition, realistic glass refraction, photorealistic, cinematic realism