vacuum container??

Yes, I put a gallon jug inside the bucket. The line from the transmission runs down into the jug. I tried using the jug only and it crumpled very fast. I am using a 5g bucket now. The bucket buckles also. Tomorrow I am going to cut a piece of wood and put it halfway down the bucket. It should not buckle so dramatically. I will have to add a cutout for the top of the jug.