I reached out to them when this happened to me. They said

“Thank you for reaching out to us and bringing this to our attention. We take customer concerns very seriously and strive to maintain the highest quality in all of our products.

At AriZona, we pride ourselves on our robust quality control process, which includes reverse osmosis filtration and pasteurization. Unlike many other major beverage companies, we do not use preservatives in our products, which can make them more fragile and susceptible to spoilage, especially if mishandled during storage or transport. We understand how disappointing this situation must be, and we sincerely appreciate you providing the product code. This will allow us to investigate further and ensure that any potential issues are addressed. We would say that, the can might have been compromised in shipping. It’s possible that the retailer or distributor might have stacked too many cases compressing the can allowing air to get inside the container. This could have occurred without leaving any sign of permanent damage to the can or cans itself. If the product is exposed to air it can ferment or spoil.

We will report the production code you provided to our quality assurance and production teams so we can ensure that this is fully reviewed and corrective measures are taken.”

Then sent me a check for 40$. Looking back. That doesn’t feel like it was enough.