This fascinating, functional instrument is the point at which science meets art. the weighted floating glass bubbles rise or sink in the clear, environmentally safe non-toxic liquid as the temperature of the liquid changes. Simply read the 24 carat gold plated tag on the lowest floating bubble to check the temperature. This 17" tall thermometer has seven floats with the temperature range from 68 degrees to 80 degrees. This beautiful, affordable unique gift becomes extra special when we sand carve it with your personalized message.