Weird behavior with water bottle?

A few weeks ago I got a new chinchilla named Bella who's about 7 months old. She's been doing really well, but she always does this weird thing with her water bottle after I change the water where she scoots up to it and it's like she's trying to pet the water off the sides of the bottle. She'll do this for a while, I've never waited long enough for her to finish. I was just wondering if anyone knows what she's doing.

I took a video of her today so here's the link: https://www.youtube.com/watch?v=6r2ixLRJen8 Sorry for the bad camera work, I was trying not to fall off my chair since she's in the top of a triple unit FN lol