How do you keep your punch cold?

I’m trying to think of new concepts for chilling our punch. We all used to do this:

But we don’t have a drinking water cooler anymore. So , this year we all plan to put our punch within this:
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I understand that people make hand ice with gloves, but I’m looking for another ideas. My Mom suggested freezing pieces of limes or lemons and am like that idea. But , I’d like to hear what all you creative haunters came up with to keep punch nice and frosty all night.

Originally posted 2013-10-10 17:26:26. Updated!