A spirit level, aka bubble level, is an instrument designed to indicate whether a surface is horizontal, level, or vertical. Bas van Raay's Under Pressure spirit level is for finding balance in life.
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In search of balance, van Raay has transformed an object that's normally under pressure, a steaming tea kettle, into a spirit level.
Made entirely of glass, says van Raay, "The [Under Pressure] spirit level is a metaphor for finding balance in a hectic Western lifestyle."