Zan iya sanya ruwa a cikin kofin thermos in saka shi a cikin firiji don daskarewa da sauri? Kofin thermos zai lalace? Dubi wane irin kofin thermos ne. Bayan da ruwa ya daskare ya zama kankara, yawan daskarewa zai yi, sai ya kara fadada, kuma gilashin zai fashe. Kofuna na ƙarfe sun fi kyau, kuma galibi suna ...
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