Insulated water bottle, 1773.
© Science Museum / Science & Society Picture Library
Sectioned replica of the insulated water bottle used by Dr Irving on HMS Racehorse on the 1773-1774 attempt to sail to the North Pole commanded by Captain C J Phipps. The expedition, which was sponsored by the Royal Society and had the support of King George III, reached a latitude of 80 degrees and 48 minutes north before ice made further progres imposible. Water bottles such as this one were suspended on a rope or wire over the side of a ship in order to take samples of water from various depths.