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Original Hoberman Sphere - Rainbow
Original Hoberman Sphere - Rainbow
$35.50
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Finger Boiler Pen $5.95

Treat yourself or a colleague with this fun-filled pen. These pens are available in red, green, or blue as shown, and all have blue ink.

Hold the pen where the methanol is encased and it appears to boil. Since alcohol has a boiling temperature of 149°F, it only seems to boil.

Actually the colored alcohol is simply expanding. As its volume increases, the liquid is forced up from the bottom sphere. The liquid in the bottom sphere quickly exhausts itself and liquid vapor comes through the section connecting the two spheres. This is seen as a 'boiling' liquid.

Looking for a finger boiler pen that's less likely to break? Look at our Passion Point Pen.

Dimensions: The pen is 5 1/2" (14 cm) long and 1" (2.54 cm) wide at its widest on top, the stand has a 1 5/8" (4.1 cm) diameter and is 3/4" (1.9 cm) high.

WARNING! Do not consume the liquid as it is harmful to humans!! If ingested, seek medical help immediately.

This pen uses glass to contain the liquid. It is not suitable for those under 16 years of age.

Gift wrap orders: input salutation in the comment section at the end of the ordering process.

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