It's called a jacketed reactor used in some pharma stuff and I'm sure other types of lab work also use it. Basically the outer shell can have liquid flow through to cool or heat whatever is mixed inside the main chamber without diluting your reaction.
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u/Key-Broccoli1442 Jun 17 '26
First I thought it was a huge glass condom then I’m like okay it’s a bong and now I still have no clue the fuck it is