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Vacuum by STANLEY, for people who would rather not buy another.
Recently seen around $30.00 — check Amazon for the current price
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STANLEY Adventure-To-Go Vacuum Bottle 1.1 qt, stainless steel, insulated, built for daily cooking and sized at 1.1 qt.
Stanley has made vacuum bottles since 1913, and the hammertone green flask is essentially unchanged because the design was right the first time.
Currently $30. The case for it is simple: buy the version that lasts and stop thinking about it.