Japanese whisky arrives at the International Space Station for research

An unmanned cargo ship loaded with emergency supplies -- including Japanese whisky -- successfully docked at the International Space Station early Tuesday, officials said.

But thirsty astronauts will have to keep their hands off the golden tipple -- it's a science experiment.

Suntory sent the Drinks to space so it could test how time in a zero-gravity environment affects its flavour.

Researchers for the company have said that storing the beverage in an environment with only slight temperature changes and limited liquid movement could lead to a mellower flavour.

The unusual cargo was placed inside the 5.5-tonne vessel "Kounotori" (stork in Japanese), which blasted off from southern Japan last Wednesday attached to an H-IIB rocket.

It was also loaded with food, water, clothing and tools necessary for experiments in space.

Japanese astronaut Kimiya Yui, 45, who is living at the ISS, used a robotic arm to grab the vessel before it was successfully berthed at the station.

The cargo ship will leave the ISS and re-enter the earth's atmosphere in late September, according to the Japan Aerospace Exploration Agency.

Euronews