I worked at Pepsi HQ years ago in college and always brought a coke to work because Pepsi sucks. They told me to not bring it to work. I did anyway and nothing else was said.
Now that’s funny
My wife works for a financial institution that has is a very large shareholder in Coke, and is even entrusted with keeping the original and subsequent Coke product receipes safeguarded. Meaning locked up.
No Pepsi products are allowed to be purchased with company funds, used at company events, or even brought from home onto company property. They sort of let the last one slide because strict enforcement would be a total nightmare and really annoy a lot of employees. But the other two are strictly enforced and people have been fired for purchasing Pepsi products with company money.