At least in all the Starbucks shops I've visited in the United States so far, the common practice is for all coffee to be served in to-go containers. There's no

At least in all the Starbucks shops I've visited in the United States so far, the common practice is for all coffee to be served in to-go containers. There's no eating in distinction, and while the shops sell (and accept) reusable cups, that isn't the default. If you eat in, and don't bring your own cup, you're served coffee in a disposable container.