Cold Foam Below the Surface

Premium realistic underwater studio product photograph, 2:3 portrait. One unbranded transparent tapered retail cup containing dark cold coffee beneath a thick ivory cold-foam topping, hermetically closed with taut clear heat-sealed film across its rim. The foam is inside the sealed cup, distinct from the surrounding water, with small visible bubbles along its upper edge. Fully submerged in clean water, the cup rests at a slight angle on a shallow blue-grey tank-floor incline, positioned in the lower right. Three-quarter elevated view reveals the foam through the clear lid and the contrasting layers through the side. Low warm amber light enters from the left, with cool soft fill, believable refraction, restrained caustics and a few tiny exterior bubbles. Crisp transparent plastic seams and realistic beverage texture; generous empty water above and left. One physical product, no escaping foam, no straw, no people or marine animals. No CGI gloss, text, logos or watermarks.