The shelf life of boxed Wangzai milk is 9 months, while that of canned milk is 15 months. According to the Wangzai milk manufacturer, the shelf life of boxed Wangzai milk is 9 months, while the shelf life of canned milk is 15 months. Want Want Company was founded in 1962, formerly known as Yilan Food Industry Co., Ltd. of Taiwan Province of China. It mainly produces canned agricultural products and exports them as its main business. In 1983, the company signed a technical cooperation contract with Iwasuka, one of Japan's three major rice cracker manufacturers, to jointly develop Taiwan's rice cracker market and quickly achieved the status of a leading brand in the market. In 1979, it began to re-explore the Taiwan market with its own brand "Wangzai", and the image of Wangzai was born. In 1987, the Want Want trademark was registered in the mainland, which was the first time a Taiwanese businessman applied for trademark registration in the mainland.