I wonder if you're referring to his talk at ChasmWare '16?

If so I remember that being a thing (potential licensing issues with the megacorp subsidiary that bottled it) so we dumped the bottle and filled it with tap to be on the safe side. Technically he didn't pay a dime and in the end it was us paying the company for the bottle and the venue (not Richard) who swallows the cost of the water and it's delivery as a utility.

At the time I was of the opinion we over-thought it a bit and involving a $100/hr lawyer was crazy. Turns out my manager was right when she said "Alexander Dmitri, I say this to you: Never under-estimate the people who might try to call this ridiculous stuff out to detract. The haters must be met with diligence."