Amazon.com said Prime subscribers in more than 1,000 U.S. cities can now add perishable groceries—including meat, dairy and produce—to their existing same-day delivery orders at no extra charge on baskets over $25. The company plans to more than double the program’s reach to about 2,300 locations by the end of the year, integrating fresh food into the logistics network that already handles electronics, apparel and household goods. Orders below the $25 threshold incur a $2.99 fee for Prime members, while non-members pay $12.99 regardless of size. Amazon said temperature-controlled fulfilment centres and insulated packaging allow strawberries, milk and frozen dinners to travel alongside traditional merchandise, simplifying the checkout experience that previously required separate Amazon Fresh or Whole Foods deliveries. The move sharpens competition with Walmart+ and Instacart. Shares of Maplebear, Instacart’s parent, fell about 11% and Walmart dropped roughly 2% after the announcement, while Amazon gained modestly. The service forms part of a previously announced $4 billion push to extend same- and next-day delivery—particularly in rural areas—and underscores the company’s ambition to capture a larger share of the $1 trillion U.S. grocery market.