Baby reaching for drinks

I always have a cup of water with me. EBF, so I'm thirsty all the time. My 4 1/2 mo old is now reaching for my cup and trying to drink out of it! I'll put it up to her lips and she tries to do what she sees mama do. We haven't started solids yet, but she's definitely showing signs of readiness. I love it, but at the same time hate it because SHE'S GROWING UP TOO FAST!