保溫壺的熱量，被畫成一圈橙色

Gouache product cutaway illustration of a dark blue insulated jug centered on ivory. A partial wall cutaway shows two shells, a narrow vacuum gap and inner liner; warm water is soft orange with a little steam above the opening. Conceptual construction visualization with no labels or dimensions.

水粉產品剖面插畫，一隻深藍保溫壺佔畫面中央，壺壁區域性切開，顯示雙層殼體、窄小真空夾層和內膽；內部熱水為柔和橙色，少量蒸汽從壺口升起。米白底，結構概念示意，不加標籤或尺寸數字。