Packaging Design Longpai Soy Sauce Packaging by Wen Liu Longpai Soy Sauce is a packaging design for a premium soy sauce intended for Hunan style stir fry cooking. The bottle is made of clear glass and measures 73.5 by 73.5 by 217.5 millimetres. A paper label contrasts with the glass and carries cultural motifs drawn from Hunan cuisine and from traditional small vat brewing and sun drying methods. The bottle form is shaped for a secure grip and controlled pouring during fast cooking. The design links the product to its cooking context and improves recognition on retail shelves.