I use the Brome Squirrel-Buster Feeder. I've had it for about 6 months now, and have yet to see any squirrel defeat it. You can find it almost anywhere, just google the name. It comes in different sizes. Usually under 75.00.
Here's a link to read all about it:

http://www.duncraft.com/Squirrel-Buster-Classic?shop

I use the Brome Squirrel-Buster Feeder. I've had it for about 6 months now, and have yet to see any squirrel defeat it. You can find it almost anywhere, just google the name. It comes in different sizes. Usually under 75.00.
Here's a link to read all about it:

http://www.duncraft.com/Squirrel-Buster-Classic?shop

I got the same one a couple weeks back and am very happy with it.

We have been using baffles with excellent luck. We only see squirrels on the ground, never on the feeders. We use the tubular baffles on a shepard's hook. There are four feeders hung from one hook and multiple other shepard's hooks placed around the yard with the same baffles, and no squirrels draining the feed. Much less expensive than a single feeder.

Martha