Since its fully automated, it does not bear the cost of a human driver. The cost is probably related to time spent in flight and weight . Maybe expensive for a single coffee, but so handy to get delivered during busy time away from anything. Hopefully cheaper than spending time on road ...
How can this be done in such an affordable way? ($3.99 in my area) Cost of drone, salary for drone operator, cost of someone to gather order and check out. Amazing!