why are you at mcdonalds for 2 hours?

http://www.physlink.com/education/askexperts/ae389.cfm

since frozen water takes up more space, when it melts, there will be no overflow. if completely submerged ice melts, there would actually be a decrease in overall volume. since ice is floating, some of the ice is above the liquid level, and when it melts, there would be no decrease or increase. ice floats pretty much the same in pop as it does in water, since pop is mostly water anyway, so the difference in displacement is negligible and doesn't matter anyway.