Wall-mounted cat food silo with dispenser

This is a silo which I created to store the food for my cats as they always bit open the plastic bags the food is normally stored in. However as the whole assembly is very strong, you may use it for any other granular material.
I had narrow boundaries for my design as you can see in the pictures attached.
The design works so you can hook the silo into the upper wall mount for normal use. If you need to refill it, unhook it from the upper wall mount and silde the pin of the funnel part into t