Granted. It wasn't specified, so the included lemon is always already squeezed into the drink, and either too little or too much.

Granted, but the server never washes their hands after handling money, before grabbing and dunking the lemon slice in your water

Granted. For good measure, now everything you eat or drink for the rest of your life will include lemon, without you having to ask.

Granted. All water has lemon in it. Showers leave you sticky and the lemon juice sprays in your eyes. Lemon rain starts to disrupt ecosystems and eat away at buildings. Only lemon sharks remain in the sea. Collapse is imminent. The citrocene is upon us. But you're very quenched when it comes.

Granted you now have a deadly citrus allergy.

You get a lemon.

Granted. Your teapot now always has an entire lemon inside. It's not clear how it got in there.

Granted, but the tea is always rancid, and the water always contains visible larvae.

Granted. Unzips pants