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These are sold at a wide range of prices. We bought two of these and tested their porosities. One absorbed 10% of its weight in water (that means a 30-gram saver soaks up only 3 grams of water). The other soaked up three times as much. But, the manufacturer of that one took advantage of the extra porosity by making a saver half the weight of the others. And, according to my firing tests, it is not terracotta (they are most likely iron-staining a mix of commercial kaolin or ball clay and adding a filler, using the word "terracotta" as a description of the color).
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Better porosity for Brown Sugar Savers
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