打工人“3秒拿铁”风靡北上广，有品牌已卖几百万瓶

Core Insights - The rise of "3-second self-made latte" has disrupted the coffee market, allowing consumers to create their own lattes quickly and conveniently without the need for coffee shops [1][3] - The collaboration between dairy brands and coffee liquid producers has led to a surge in sales, with some brands selling millions of units [3][5] Group 1: Market Trends - The coffee industry is experiencing intense price competition, with prices for some coffee drinks dropping as low as 3.9 yuan [5] - The combination of milk and coffee liquid appeals to consumers due to its transparency in ingredients, allowing them to see what they are consuming [5][7] Group 2: Consumer Behavior - The DIY aspect of the milk and coffee liquid combination addresses the time constraints and decision fatigue faced by modern workers, making it an attractive option [8] - The product has expanded consumption scenarios, allowing for coffee enjoyment during travel, commuting, and outdoor activities [11] Group 3: Product Development - The simplicity of the milk and coffee liquid combination has sparked a trend, with various coffee shops and retailers beginning to offer similar products [13] - Companies are exploring new product formats that combine dairy with coffee or tea, indicating a growing market opportunity [15][16]