Premium ecommerce hero photograph, a matte deep-green stainless steel insulated flask standing upright on a frosted wooden tree stump outdoors in early winter, Lidong season. The tall slim flask has a clean cylindrical body with a brushed metal lid and no logo or text. Beside it, an open enamel mug of hot tea releases a thin curl of steam, a few dried orange slices and a small pine sprig arranged at the base, soft snow-dusted pine branches blurred in the background, gentle warm morning sunlight from the left, cool blue shadows. Shot on an 85mm lens, eye-level three-quarter view, crisp brushed metal texture and fine frost crystals on the wood, warm and cool color balance, clean negative space on the left for product copy, no text, no watermark, no fake logo, 4:3 landscape composition.