Hypothetically yes, but practically no. Water with syrup is supposed to be rung in as a custom iced tea. Is it silly as heck and a ridiculous money grab from corporate? Absolutely. But is it also the standard? Unfortunately. So you would still be charged for like 3.50 or whatever it is nowadays, even for a small. You’re better off just paying for your drink with your partner discount.

You really don't want to get into rewards program fraud no matter where you work. It's super easy for them to track since it's tied to your personal information and not something worth getting fired over if they ever look closely at you.

The bonus stars for a personal cup is also maxed out at 3 times per day.

If you use the cup discount for the 25 stars, your partner discount doesn't apply.

Yes, but you should be charged for a custom tea, a drink with your partner discount will be cheaper.