Upright asparagus steamers are not so great for steaming asparagus. I find my asparagus often overcook, and get beat up as they collapse in the container. Better to lay the asparagus in a pan, add a little water or stock, cover, and steam. But the upright steamer is perfect for processing a single half pint or pint jar of canned stuff. As far as I am concerned, asparagus steamers could be advertised as a one-jar water bath canner.