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Stanley 2-Liter Thermos Only Keeps Water Hot for 8 Hours
A 2-liter Stanley thermos I purchased on Amazon in 2026 is falling far short of my expectations when it comes to heat re...tention. Even when I fill it with boiling water, it starts to cool down noticeably after just 8 hours. From a brand like Stanley, especially in a thermos this size, I would expect
