Hey at least its not coffee...

That said, you could always exchange with the shop owner in advance, its not like people usually interact directly with the Coca Cola company. Unless its some sort of vending machine?

Or Coca Cola wants to associate its image with a "cool millennial thing" like Bitcoin, in which case its "free" promotion (actually paid when you buy their product).

But bitcoin was meant to be used to buy things, including this. So why not?