coke cans floating

[Xenon]

We put a can of coke and a can of diet coke in a beaker of water, and they both float - the regular coke's supposed to sink. Is there something we're missing?

[Matt_Coffs]

I did this a few years ago and it worked properly. Air bubbles under the can? Maybe try another can of normal coke?

[DavidPeterson]

definitely works....

also check the temp of the water it may be a factor. I'm assuming both cans were room temp?

[RosalieM]

We have tried this too with no success. I just assumed that the pictures I had seen were American or something because they have a different recipe (everyone I know who has been there says "Don't drink the coke!"). A teacher tried with bottles first, and my thought then was the air bubble was making it float but then the cans did too.

[Xenon]

tried different cans, room temperature in tap water - all float
we using 200ml size; would that make a difference?

[RosalieM]

The ones we used were the regular 357ml, also at room temp.

[DavidPeterson]

we used full sized (375mL) cans. I think we used Coke v Coke Zero as well

[RosalieM]

hmmm... perhaps the water is too cold? What if you tried cold cans and room temp water? Our water comes out pretty cold, so might be worth adding some hot? I think we tried it last term so it would have been really cold then.

[Xenon]

no coldies atm; just tried in hot tap water - same deal, both float
weighed 2 cans, about 14g difference