3-Tier Cooling Rack 5 "Can be used individually or stacked , not dishwasher safe." Mr BUTLER 26 August 2020 Works well and can be used stacked or not stacked. Stacked they are sturdy with their folding legs, and when not stacked they take up less space for storage. They are not to be cleaned in a dishwasher but that is the same with most cooling racks. As mentioned in other reviews the legs don't click into place but I did not find this a problem when used and thought they were sturdy enough. When storing as the legs dont click into place if they are stored on their side then you notice the legs not clicking into place more.