Why is My Straw Floating?

So the other day, I was out eating with friends. Now, any time I order something like soda or lemonade, I always them not to add any ice. As we're sitting around talking, I notice that I was the only one at the table who kept pushing their straw back into my soda. I'm also the only one at the table without ice in their drink. I also noticed that there were three other people drinking soda as well. They were drinking Coke and Dr. Pepper while I was drinking sprite.

Naturally, I inquired: why is my straw the only one that keeps floating to the top of my drink? There were a couple of potential answers that crossed my mind. It could be either because there's no ice in my cup or it could be because I have a lighter colored drink. I quickly eliminated the latter because I do notice it happens when I order Dr. Pepper without ice as well.

So my answer is more than likely because I didn't have ice. Once I posed the question to my group of friends, one of them noticed that there were bubbles on the sides of my straw which was probably the cause of the straw constantly floating to the top.

During my research for an answer, I came across an activity that seems related to this topic. It's titled: "Why do Raisins Dance in Soda Pop?" It's not completely related to what I'm discussing here, but I figure the reason for the raisins floating might be the same reason my straw is floating.

Until next time friends,
Christina