Effervescent Tablet in Clear Drinking Glass

studio product photography of a clear cylindrical drinking glass filled with water, an effervescent tablet dissolving near the bottom center, dense white bubbles and cloudy fizz rising through the water, crisp transparent glass rim and reflections, minimal clean composition, centered subject, slight tabletop reflection, smooth blue gradient background transitioning from deep teal at top to lighter cyan near the horizon, sharp focus, realistic water refraction, glossy highlights, fine carbonation texture, commercial advertising style, calm clinical freshness, 85mm lens, straight-on eye-level view