Tip Proof Feeder

Anyone have a recommendation for a bottom heavy automatic feeder that can't be tipped over?  My cat can't be free fed (he eats too much too fast) and I go out of town a lot.  I use an automatic feeder while I'm gone but he often tips it over (even if I have it tied to the bed post).  Any suggestions would help!

I use this one
and it is heavy enough to not be tipped over.  I really like it for when I am away.

Thanks! That would work for a short weekend but I could also use something that holds a little more food. Every once in a while I go away for a long weekend or even a whole week.

The Petsafe 5 compartment feeder works well. Maybe get two of them? I would not leave a cat alone for an entire week even if food and water is provided. Can you have someone check in on the cat at least once a day to make sure the cat is ok?