The pack design for features a glass bottle incorporating a gold lining and the stopper resembling a precious stone, which creates the impression of a luxurious and stylish ring.
To achieve the gold lining effect, RPC beauté electroplates ABS plates in a light gold finish. The company worked closely with the glass manufacturer in the development of the plates to ensure that they allowed for any variations during the production of the bottle in order for them to fit smoothly and tightly around the edge.
Source:
http://www.packagingnews.co.uk/design/markets/golden-touch-from-rpc-beaute/