Walmart offers the AcuRite Galileo Thermometer with Glass Globe Barometer, model no. 00749WB, for $12.88. Opt for in-store pickup to avoid the $5.99 shipping charge. That's the lowest total price we could find by $11, although we saw it for a buck less last April. This device uses enclosed balls of colored liquid that expand and contract with heat to measure temperature and barometric pressure.
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