Nansen-Petterson type water bottle, containing a thermometer within the smaller cylinder. In a green-painted wooden box with handles at each end.

'In the 1950s, the Nansen-Pettersson insulated water-bottle was commonly used for determining the temperature and collecting water samples below the surface in shallow seas. The insulated bottle used in British laboratories consisted of six brass concentric cylinders connected by ebonite spacing pieces, the outermost cylinder being chromium-plated and the two innermost silver-plated. The lid and bottom are made of brass and are chromium-plated, and on the inside each carries a disk of ebonite sandwiched between two rubber washers. This form of insulation is said to prevent any changes in temperature for 6 minutes.' (A Note on the Use of the Nansen-Pettersson Water-Bottle’ by A. J. Lee and G. C. Baxter, ICES Journal of Marine Science, vol 23, April 1958, p 157)

Box has Institute of Oceanographic Sciences, Deacon Laboratory scientific inventory number S193.