Unverified75% confidenceDecision RuleTime unknown
真空保温效果与内胆密闭程度直接相关，购买时轻摇餐盒若听到内壁有晃动异响或摸外壁明显发热，说明真空层已失效或本身非真空，保温会大打折扣
1
Sources
75%
Confidence
Long-term
Relevance
-
First Seen
Sources
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