Unverified80% confidenceTradeoffTime unknown
保冷时长与重量便携性存在矛盾：VIP真空板+厚保温层的硬质冰箱包保冷强但自重2-4kg，软质折叠冰包轻便可折叠但保冷普遍在4-6小时，日常带饭或1-2小时通勤选软质即可
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80%
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Long-term
Relevance
-
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