A vibrant, close-up Instagram photo of a sleek, modern tube of purple teeth whitening paste on a clean, white marble countertop. The purple paste is elegantly swirled out of the tube, with subtle sparkles to emphasize its whitening power. A bright, minimalist bathroom background with soft lighting and a hint of greenery to give it a fresh, premium feel. The focus is on the product, creating an eye-catching contrast with the white surroundings