Note that this novelty device is not really suitable as a child's toy as the glass is easy to break and it contains a fairly aggressive solvent.
This video is an explanation of how these toys work, and a sudden random tangent into refrigeration technology too.
Here's a search link for eBay if you want one. :-
Target price is sub $5.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
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