This is an animal feeder I made. It has potencial to be enlarged the size you want, simply by using a bigger base and more holes in the pipe.
To make it, cut a bottle's bottom, get a PVC pipe and make a cut in the bottom like in the picture, glue them and you're done.
To use it simply put animal food in the pipe and it will run if ends near the hole until the food is over.
Awesome! Looks really easy to make :)
it is

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