Yea, I wasn't sure if this was water or oil with resistant high temperature vipers. Or someone smashed up vipers and boiled it, to be painful and extra gross?

Yea, I wasn't sure if this was water or oil with resistant high temperature vipers. Or someone smashed up vipers and boiled it, to be painful and extra gross? Or both, where vipers were boiled, and new vipers were constantly being added to bite, then turn into boiling viper soup themselves. IDK about plot hole, I assume the both method will get the job done. But, I do question the efficiency and practicality.