FWIW I found that making a double layer pad of Reflectix (See Reflectix 24 In. x 25 Ft. Staple Tab Insulation - ST24025 at The Home Depot ), to fit on top of foodstuffs in our icebox, dramatically improved the longevity of block ice. While we now have a refrigeration system, we still use Reflectix pads in both the refer and freezer and our energy usage is reduced measurably. The material is inexpensive, easily cut and layers can be glued together with spray adhesive.
s/v HyLyte
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"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
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