I agree. Direct contact with the cooling surface will drag out the heat faster than a can in the cold air.

I would like for there to be an even "cooler" answer though

Then maybe this is even cooler:

Your frozen drink was touching the back of the sub-zero fridge?

I think you had a diet soda...there is something about the sugar in the regular sodas that would keep it from freezing as fast.  (maybe the other way around, but I think I'm right)

mathsyperson wrote:

It's a little-known and counter-intuitive fact that hot water freezes before cold water.

Now I have heard that before, and still disagree. Possible Urban Myth?

Note for Posterity: Mathsy's current signature is "A man sent in 10 jokes to try to win his newspaper's pun competition.
Unfortunately, no pun in ten did."

I couldn't resist this one.  Heavier objects do fall faster than lighter ones in many examples.  If two objects have the exact same shape and size but differ in density, the denser object will indeed fall faster.  Drop a full bottle of water and an empty bottle of water from the second floor of your home and this will be quite evident.  Only in a vaccuum do objects of different masses and shapes fall at the same rate.

     Sadly, hot water does not freeze faster than cold water either.  Temperature difference does greatly affect the rate of heat transfer because of equilibrium laws, but at some point the temperature differences of the hot versus cold water would be at comparable rates and thus would be cooling at similar rates.  There could be an exception or rather "trick" in what you propose.  I could easily freeze say a gallon of boiling water faster than five gallons of 40 degree cold water.  This is because of the total energy within these samples.  And unless someone shows you equal volumes of ice after such an experiment the experiment is faulty.

I would like to throw mathsyperson a bone here for being a good sport.  I read an article proposing that the myth was indeed true.  An experiment was conducted where hotter water was made to freeze faster than cold water, but the conclusion made by most was false.  The final volumes were not the same.  What in fact did occur was that a smaller amount of hot water froze faster than a larger amount of cool water.  I'll pat myself on the back for suggesting this earlier.

     So the myth is partly true, but it has nothing to do with temperature and everything to do with total energy.

Would liquid in a plastic bottle freeze first or an aluminum can or what about glass?

Did they still have glass bottled soda "Last month"?

This is all assuming that the outside environment is cold enough to freeze the liquid.
But yes, irspow is right. It's all about the heat conductivity of the materials.

And now, time to use people's quotes against them.

irspow wrote:

I couldn't resist this one.

irspow also wrote:

Drop... an empty bottle of water.

Sorry for the long wait in a reply, the answer was that one was a diet cola, and therefore it had a lower freezing point!