I use a Vittles Vault rated for a 40lb bag of food. It has worked well for me. I have been having a hard time with ants however I have a bag of opened ferret food in the same pantry so it is quite possibly that.
As far as opening and closing the bin twice a day (or however many times you feed) I would imagine would have some effect on the food. Although I’m no expert and can’t really say for sure. I think I remember reading somewhere where someone said their dog seemed less enthusiastic about the food the closer it got to the end of the bag.
I have never heard of your pet silo system but it sounds nifty. I’ll have to look into it.
