Potion Bottle Bubble String Lights by ThinkGeek

Some of our employees here at ThinkGeek World Domination HQ are young enough that they don't remember these on trees from holidays long past. These "bubble lights" were incredibly popular in the 50s and 60s. Basically, the light heats up a little vial of methylene chloride (boiling point 103.3° F) which bubbles away, creating a mesmerizing visual effect.It's chemistry in action! When...

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Potion Bottle Bubble String Lights by ThinkGeek