Of course not. No !!! Why on earth would you want to do that? And anyway - why bother with only a few sips if you are considering it.
Not meaning to sound harsh, but I also think you already knew what answers you would get here.
Please change your mindset asap. Think of it this way. For a toast , you need something liquid in a pretty glass. That's all. It really doesn't matter what it is. Sparkling water, soda, whatever. Think how great you will feel if you don't give in and how absolutely disappointed you will be with yourself if you do. And the toast only lasts a moment. You can do this . Don't worry. You won't sip champagne because you don't need it and you know that.
