I had other plans for this device, but it turns out that the glass is very thin.
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. :-
https://www.ebay.com/sch/i.html?_from...
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:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.