It may even be that we should have failed had it not been for so simple a thing as an improved form of water boiler which I was fortunate enough to have hit upon. By its aid we were able to melt ice and make tea in ten minutes. On our previous journeys this process had taken an hour. Tea is an imperative necessity on such a driving journey, and this little invention saved one and one-half hours in each day while we were struggling toward the Pole on that journey when time was the very essence of success.
Robert E. Peary, writing in The North Pole: Its Discovery in 1909 Under the Auspices of the Peary Arctic Club (1910, Frederick A. Stokes Co.), on the imperative necessity of tea.