Sony is putting its money where its mouth is by proving to consumers that its waterproof MP3 player can live up to its name.

The Japanese electronics giant has launched a new marketing campaign in New Zealand for Sony's Waterproof MP3 players, whereby each MP3 player comes packaged in a Walkman-branded bottle of water.

The Bottled Walkman is being sold in vending machines in leisure centres and gyms throughout New Zealand, and while these water resistant MP3 players have been available worldwide for the last two years, this is the first time that they have been packaged this way.

The particular MP3 player included in the Bottled Walkman is the NWZ-W273, which was launched at CES in January.

For every three minutes of charging time, the Walkman can be used for an hour, and the headphones are connected to the device via a tension band, and include three sizes of adjustable earpieces.

According to Sony, the device can be submerged in water to a depth of up to 6.6 feet (2 metres), but should not be used in sea water.

The video below shows the new Sony Bottled Walkman being sold using a vending machine and playing up the fact you can use the new Walkman while swimming: