打工人“3秒拿铁”风靡北上广，有品牌已卖几百万瓶！

Core Insights - The article discusses the rising trend of "3-second self-made latte" among office workers, highlighting its convenience and appeal in urban areas [6][9][11]. Group 1: Market Trends - The "3-second latte" has gained popularity in major cities, allowing consumers to easily create their own lattes using fresh milk and coffee liquid or powder from convenience stores [9][12]. - Major dairy companies like Mengniu and Meiji Fresh have launched products combining milk with coffee, catering to the growing demand for quick and transparent beverage options [12][13]. Group 2: Consumer Behavior - Consumers are drawn to the transparency of ingredients in the milk and coffee combination, which contrasts with the often opaque nature of ready-to-drink coffee products [19][21]. - The DIY aspect of making coffee at home appeals to busy office workers, providing a sense of ritual and satisfaction without the need for complex equipment [22][24]. Group 3: Product Development - Companies are responding to consumer demand for convenient and transparent products, with many coffee shops and retailers exploring new offerings that allow for self-preparation of beverages [31][32]. - The combination of milk and coffee liquid is seen as a simple yet effective innovation that meets consumer needs for convenience and quality [43][44].