Unverified80% confidenceTradeoffTime unknown
容量越大自重越轻的诉求相互冲突：超轻薄壁大桶（20L仅300g）盛满水后侧壁支撑不足难以提起，容量＞15L应接受更厚壁材和更高自重
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80%
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Long-term
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