This is the Roomac: a mobile robotic platform with a 5DOF manipulator and ROS based software that was made for about $550. As the maker explains, the robot can be programmed to fetch and deliver a bottle to a defined location.
Must see robots & drones:
Roomac Autonomy Demo | Low-Cost Open Source Personal Robot
You can find the code for this robot on GitHub. You can find out more here.
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