Caustic Cask Symbol

I wanted to ask a question, it would actually be amazing if I could get a Rioter to answer this, but I guess that won't happen so at least I want to ask the community here for their opinion.

On the Caustic Cask card from Legends of Runeterra, we can see a symbol: https://img.rankedboost.com/wp-content/uploads/2019/10/Caustic-Cask-Legends-of-Runeterra.png As a Zaun fanatic, I would really like to know what this symbol is supposed to represent.

Is it the crest of one of the chembarons in Zaun, meaning that this chembaron is the one producing these casks? I looked at Urgot's splashart again to see if I can find this sign on his arm, since this is basically the only source of chembaron crests we currently have (as far as I am aware), but it seems that this particular symbol is not among them. So if it really is a chembaron crest, then Urgot didn't kill the associated chembaron yet.

Or maybe this sign is Zaun's version of the biohazard symbol? https://lh3.googleusercontent.com/proxy/o-O6ecgvWborDRulV-moXIMxJw99NIcOMBbFGhoyXnpDEov7l4xNxnrNmAQtGevS-c59RNEfUYOtYgw9ggPT-bRiB2Qmb7lCJz6fljNyApeY-b1RsTmIrmXtPA2r94E1dy0kjef5WasVaCDbxEVWxXQz45VRUbZBJDuzg-dw97tM7mA4E0SMLvkA8Kt1fPif5BY

Just would really like to know what this is supposed to mean here.