Increasing the efficiency of time and cost of delivering goods is urgent now. The need for fast delivery times is crucial for certain items such as breast milk. It is common for mothers who have children who still need breast milk to work to help the family economy in big cities like Jakarta (Indonesia). Even if a mother has to work, the milk needs for her child must be fulfilled. Often a mother has to send milk to her home from work because she is out of stock at home. Problems with delivery

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... mes arise because breast milk does not last long at room temperature. Breast milk can be stored for 3-4 hours at room temperature (16 °C -19 °C), 72 hours in a refrigerator (4 °C), 5-8 days in a refrigerator under very clean conditions, and up to 12 months in a freezer (−17 °C) [7]. At room temperature, the breast milk must arrive at home immediately for consumption. Deliveries with refrigerated cars might be possible but what is the efficiency comparison if it is delivered with a drone (hexacopter)? Keywords: drone (hexacopter), car, efficiency of delivery, breast milk problem I.