Employees work at Amazon's Prime Now fulfillment centre in Singapore July 27, 2017.

Amazon Prime Now delivery bags are seen in this illustration photo July 27, 2017.

People pass a signage at Amazon's Prime Now fulfillment centre in Singapore July 27, 2017. REUTERS/Edgar Su

A woman passes a wall sign at Amazon's Prime Now fulfilment centre in Singapore July 27, 2017.

Employees work at Amazon's Prime Now fulfillment centre in Singapore July 27, 2017.

An employee works at Amazon's Prime Now fulfillment centre in Singapore July 27, 2017.

Director of Amazon Prime Now Asia Pacific Aarif Nakhooda speaks during their launch at Amazon's fulfillment center in Singapore July 27, 2017.

Amazon Prime Now delivery bags are seen in this illustration photo July 27, 2017.

A view of shelves of merchandise at Amazon's fulfillment centre ahead of the launch of their Prime Now service in Singapore July 27, 2017.

A general view of a building housing Amazon's Prime Now fulfillment centre (C) in Singapore July 27, 2017.

An employee works at Amazon's Prime Now fulfillment centre in Singapore July 27, 2017.

An employee works at Amazon's Prime Now fulfillment centre in Singapore July 27, 2017.

A man passes an Amazon Prime Now signage at their fulfillment centre in Singapore July 27, 2017.