Unverified85% confidenceDecision RuleTime unknown
壁厚保温层≥5cm（PU发泡）的硬箱才适合过夜保冷；软箱保温层普遍＜2cm，保冷极限约12-24小时，超过一天需求不要选软箱
1
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85%
Confidence
Long-term
Relevance
-
First Seen
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Unverified硬质保温箱(EPS/PU发泡)保冷强但笨重占空间，软质保温包(带真空镀铝内衬)轻便可折叠但保冷仅6-12小时，通勤带饭/短途野餐选软包足够79% similarUnverified保温式调奶器选真空双层不锈钢内胆，6小时保温需≥45℃才能满足夜间起夜冲泡；玻璃或单层塑料内胆保温普遍＜2小时，仅适合短途77% similarUnverifiedEPP发泡箱在3cm壁厚下配合冰袋可维持0-8℃冷藏温度8-12小时，若需24小时以上跨省运输需选择壁厚≥4cm的EPS或真空绝热板(VIP)箱体76% similarUnverified保温性与便携性冲突：真正能保温3-4小时的是不锈钢真空焖烧罐结构，但这类基本无法做分格且笨重；普通带保温袋的分格饭盒实际只能维持温热1小时左右，指望它中午还烫需配合微波复热76% similarUnverified保冷性能核心是隔热层厚度而非品牌，PU发泡层每增加10mm，保冷时长约延长4-6小时；EPS泡沫填充成本低但保冷力明显弱于PU发泡74% similar
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