Dining at the Weichert Buffet!

Up here in Pike county PA, Kurt the bear has decided to dine regularly at our dumpster. Does anyone have any good deterrents?

We tried a metal bar across the lids, Kurt just ripped the lids up over the bar. Then we put two 2 x 4's under the plastic lids and Kurt jumped on top of the lids until the 2 x 4's splintered like toothpicks! I think he was actually laughing at us!