Try pot
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A try pot is a large pot used to remove and render the oil from blubber obtained from cetaceans, pinnipeds and also to extract oil from penguins[1] Once a whale had been caught and killed, the process of removing the blubber from the whale (flensing) began. The raw blubber was then placed in trypots in order to extract the oil. On whalers trypots would be built into the deck, a part of the ship known as the tryworks.