If you drink it now, would you stop? Would you forget that it exists even though it's on store shelves, in vending machines, and pushed at several restaurants? Who would stop?
Almost no-one can honestly answer this for themselves. I think the truth is likely: 'no, I'd still order a coke at McDonald's, I'd still pick a coke up from a vending machine if I'm thirsty. But if I'm buying a takeaway sandwich, I might not also get the drink. Or if I'm in the supermarket, I might just skip that aisle.'
I'm sure it's almost completely subconscious.