What is your dogs favorite toy?

This is Charlie’s favorite toy.  We put some dog food and treats in there and he will play with it until he gets all the food out.  We like it because he can play on his own. After doing some research it is called Tug A Jug Dog toy.  We found it at Target.  He has had it for 2 months now and has not ruined it.  Reading some reviews of other dogs tell me that other did not have as much luck. 
He can get the treats out in the small gap where the rope is.  Sometimes we take out the rope to make it a little easier on him.  I hope your dog likes the toy as much as Charlie does!  We thought $13 was expensive for a toy but now we think it was worth it.