Walmart is building giant self-service kiosks that retrieve customers' online orders in its stores.
The company said Thursday that it's planning to add the kiosks, which Walmart calls pickup towers, to 700 stores this year. Walmart is also pairing the new towers with pickup lockers, which hold larger items like televisions.
With the expansion, pickup towers will be available to nearly 40% of the US population, Walmart said.
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