Birdfeeder Redux

Unfortunately, our last birdfeeder met an unfortunate demise:

I checked it one day and the hole for the seed had grown by about 1/2 an inch down from where I had cut it.  How did this happen?

Blasted squirrel.  I actually caught him one day hanging upside down from the crossbeam and nibbling on the seeds within.  Having just finished another tub of kim-chee, we decided it was time to come up with a new design.

I cut four slots 3 inches wide and 1 inch tall along the base of the jar and screwed an old ice cream container lid to the bottom.  This will allow the seed to constantly feed into the tray below by virtue of gravity.  I also hung it a bit lower to prevent mr. squirrel from damaging version 2.

Any ideas on how to deter the squirrel?